Information regarding the actual date is vague but a relatively accurate timeline of events is possible.
Before the series Edit
These are all of the events that were referenced/mentioned throughout the series that have happened prior to the landing of the 100 on Earth. All dates are backtracked from the confirmed date of the nuclear apocalypse, stated to have been in 2052. This is used as Ark Year 1 (year zero doesn't exist in common calendars), the first year people lived on the Ark.
|Date (CE)||Ark Year||Event|
|1959||−93||The Mount Weather Emergency Operations Center is founded.|
|2001||−51||Association football (FIFA) game is played as seen in flashbacks on the Ark.|
|2019||−33||Mir-3, predecessor of the Ark, is presumably launched.|
|2025||−27||Becca is born.|
|2040s||Earth loses contact with Asteroid Mining Penal Colony.|
|2041 July 4||−11||A terrorist group, called the "United Liberation Army", led by Charmaine Diyoza, launched a terrorist attack on Thursday, July 4. 80 civilians were killed.|
|2042 Aug. 12||−10||The "United Liberation Army" launched a terrorist suicide bombing attack in Washington, D.C. that resulted in 19 civilians killed.|
|2047 April 4||−5||Charmaine Diyoza, along with the other prisoners, take control of Eligius IV.|
|2048||−4||Two dozen mega reactors had been built to withstand any disaster, even a nuclear attack.|
|2051 Oct. 20||−1 (0)||A.L.I.E. chooses her avatar to be Becca and confirms her mandate is to "make life better" by "fixing the root problem" of "too many people."|
|2052 May 10||1|| A.L.I.E. causes the Nuclear Apocalypse.
Chris records a video of himself on the day of the nuclear apocalypse, claiming that "she got the launch codes". He then kills himself during the recording.
|2054 Oct. 1||2||The Alpha Station destroys the 13th Station, known as Polaris, leading to the unification of the 12 remaining stations into The Ark.|
|2054||2||Becca was burned alive by the Second Dawn cult members, led by Bill Cadogan.|
|2086||34||Dante Wallace is born.|
|2093||41||The doors of Mount Weather are opened, 54 people die of radiation, including Dante's sister and mother. Dante goes outside for 5 minutes.|
|2102||50|| MIR-3 salvaged and incorporated into The Ark.
Thelonious Jaha is born.
|2107||55||Marcus Kane is born.|
|2109||57||Abigail Griffin is born.|
|2126||74||Bellamy Blake is born.|
|2128||76||Lexa kom Trikru is born.|
|2130||78||Raven Reyes is born|
|2131||79||Clarke Griffin is born.|
|2132||80||Octavia Blake is born.|
|2137||85||Charlotte is born.|
|2148 Fall||96|| Catastrophic Life Support System Failure discovered.
Jake Griffin gets floated as he attempts to go public with the discovery.
|2149||97|| The 100 receive Earth Skills from Pike on The Ark.|
The 100 are sent to Earth and land in what was formerly Virginia in the United States of America.
In the series Edit
Season Four begins right after season three ends.
|Time on Earth||Date (2149)||Episode(s)||Event|
|Day 1||Sep. 13||Pilot|| The 100 land on earth 20 miles west of Mount Weather, Virginia, in the Shenandoah Valley.|
Clarke leads a group to Mount Weather while Bellamy starts setting up The Camp.
The Woods Clan-Sky People Conflict unofficially begins with the Delinquents inadvertently invading the Woods Clan territory.
|Day 2||Sep. 14||Pilot, Earth Skills|| Jasper Jordan is speared from across a river near Mount Weather.|
A rescue party gets Jasper back to camp. Thelonious Jaha abstains from voting on the culling, postponing it for 10 days.
|Day 4||Sep. 16||Earth Kills||Trina and Pascal are killed by the Acid Fog overnight. Clarke comforts Charlotte after a nightmare.|
|Day 5||Sep. 17||Earth Kills||Clarke tries to save Jasper. Another round of Acid Fog traps everyone overnight.|
|Day 6||Sep. 18||Earth Kills||Clarke mercy-kills Atom after he was trapped in the Acid Fog.|
|Day 7||Sep. 19||Earth Kills||Charlotte kills Wells at night.|
|Day 11||Sep. 23||Murphy's Law||John Murphy is blamed for murdering Wells and they attempt to lynch him.|
|Day 12||Sep. 24||Murphy's Law, Twilight's Last Gleaming|| After a night on the run, Charlotte commits suicide. Murphy is banished. Raven Reyes leaves the Ark on a drop ship headed to Earth.|
320 Ark residents are culled to conserve oxygen. That night, flares are set off to alert the Ark they're alive on the ground. However, the flares burn down an entire village, presumably killing an unknown number of Grounders.
|Day 13||Sep. 25||His Sister's Keeper, Contents Under Pressure|| Overnight, Bellamy and a group of delinquents set out in search of a missing Octavia. That morning, John Mbege, Diggs, and Roma die at the hands of Grounders.|
The delinquents finally establish contact with the Ark just as a hurricane hits.
Lincoln is captured and tortured.
|Day 15||Sep. 27||Day Trip|| Dax is sent to kill Bellamy but Bellamy kills him instead. Bellamy is pardoned by Jaha.|
Octavia frees Lincoln.
|Day 19||Oct. 1||Unity Day||The 100 and the Ark citizens celebrate Unity Day.|
|Day 20||Oct. 2||Unity Day|| Clarke and Anya attempt a peace meeting at the bridge that ends in failure.|
The Exodus ship comes down a day early and crashes.
The Woods Clan-Sky People Conflict officially begins
|Day 23||Oct. 5||I Am Become Death|| The delinquents investigate the wreckage of the Exodus ship.|
Murphy returns to The Camp.
|Day 24||Oct. 6||I Am Become Death||Murphy was carrying hemorrhagic fever with him and infects most of the Camp.|
|Day 25||Oct. 7||I Am Become Death||Raven and Jasper blow the bridge separating the Grounders from the Delinquents to delay the impending grounder attack.|
|Day 27||Oct. 9||The Calm||Clarke and Finn are taken captive by the Grounders in order to save Tris after she was mortally injured in the bridge explosion. Tris dies and Clarke kills Caliban, trying to escape.|
|Day 28||Oct. 10||We Are Grounders (Part 1)||Bellamy is taken hostage by Murphy, but later escapes. Clarke and Finn escape the Grounders with help from Lincoln.|
|Day 29||Oct. 11||We Are Grounders (Part 2)|| The battle between the Delinquents and the Woods Clan occurs in the Delinquents Camp.|
The Ark disassembles into the original 12 Stations on the way down to Earth.
|Time on Earth||Date (2149)||Episode(s)||Event|
|Day 30||Oct. 12||We Are Grounders (Part 2), The 48|| The next day, the surviving 48 of the 100 are taken by the Mountain Men to Mount Weather.
Clarke breaks out of her quarantine room and is reunited with the other 47 Delinquents.
|Day 31||Oct. 13||Inclement Weather|| Octavia Blake meets Nyko.|
Lincoln and Nyko are captured by Reapers.
|Day 32||Oct. 14||Reapercussions|| Indra, Octavia and others free Nyko and other Grounders.|
Clarke and Anya escape Mount Weather.
Kane gives Abby the Chancellor's pin.
|Day 33||Oct. 15||Many Happy Returns, Human Trials|| Bellamy, Finn, Murphy, Monroe, and Sterling rescue Mel. Sterling dies in the process.|
Jaha meets a family of Nomadic Grounders in a desert but is later traded for a horse.
Anya is killed by a Camp Jaha Guard. The guards bring Clarke into Camp Jaha thinking she is a Grounder.
|Day 34||Oct. 16||Human Trials|| Bellamy, Octavia, and Monroe bring Mel back to Camp Jaha.|
Kane is imprisoned in Tondc and reunites with Thelonious Jaha. Bellamy, Octavia, and Clarke leave Camp Jaha to go after Finn and Murphy.
|Day 35||Oct. 17||Human Trials||Finn massacres 18 innocent Grounders in Tondc|
|Day 37||Oct. 19||Fog of War|| Two days after the massacre, Finn is pardoned by The Council.|
Raven tells Clarke they need to blow Mount Weather's radio tower. Abby decides to join them.
|Day 38||Oct. 20||Fog of War||A mission to Mount Weather takes place to destroy the radio tower at its summit. Bellamy and Octavia discover Lincoln as a Reaper. Thelonious Jaha is sent to Camp Jaha by the Commander.|
|Day 39||Oct. 21||Long Into an Abyss|| Keenan Mykulak dies of prolonged radiation exposure.|
Bellamy and Octavia chain Lincoln up in the dropship. Lexa arrives.
|Day 40||Oct. 22||Long Into an Abyss,Spacewalker|| Harper is taken by Lorelei Tsing and Cage and has her Bone Marrow extracted by Dr.Tsing.|
Clarke enters the Grounder's camp to negotiate a truce only to find out the only way to start a truce is for Finn to die. She then returns to Camp Jaha with the news.
|Day 41||Oct. 23||Spacewalker|| Desperate attempts to keep Finn safe take place.|
That night, Clarke mercy-kills Finn.
|Day 42||Oct. 24||Remember Me||A group travel to Tondc for Finn's funeral.|
|Day 43||Oct. 25||Remember Me|| Finn's funeral takes place at Tondc, and his body is burnt. Gustus poisons himself to destroy the peace between the Sky People and the Woods Clan.|
Monty gets the radio signal out.
Bellamy and Lincoln are sent to Mount Weather.
|Day 44||Oct. 26||Survival of the Fittest|| Bellamy and Lincoln travel to Mt. Weather.|
Clarke and Lexa avoid being killed by the Pauna. That night, Clarke gets an entourage and a horse.
Indra makes Octavia her Second. Bellamy is taken into Mount Weather.
|Day 45||Oct. 27||Coup de Grâce||The Mountain Men attempt to assassinate Clarke and fail. Bellamy contacts Clarke from inside Mount Weather. Cage takes control of Mount Weather from his father. Clarke takes charge of the Sky People from her mother.|
|Day 47||Oct. 29||Rubicon|| A meeting of the 12 Grounder Clans takes places in Tondc|
That night, a missile is sent directly from Mount Weather to Tondc, killing ~250 Grounders and Sky People.
|Day 48||Oct. 30||Resurrection|| The surviving residents are rescued from the bombing in Tondc. That night, they leave for Mount Weather.|
The Delinquents fight against the Mountain Men to save themselves. Some Mount Weather residents help the Delinquents hide from Cage.
|Day 49||Oct. 31||Bodyguard of Lies||That night, Lexa orders the death of Octavia as they wait for Bellamy to take out the Acid Fog machine.|
|Day 50||Nov. 1||Bodyguard of Lies, Blood Must Have Blood (Part 1)||The Battle of Mount Weather begins|
The Acid Fog machine is destroyed. They march on Mount Weather. Philpott Dam is neutralized. That night, Lexa agrees to a truce with the Mountain Men in exchange for her people trapped inside Mount Weather.
|Day 51||Nov. 2||Blood Must Have Blood (Part 2)|| Clarke, Bellamy, and Monty irradiate Level 5 of Mount Weather, killing every resident of said location except Carl Emerson.|
The Battle of Mount Weather ends as well as the Mount Weather War.
|Day 52||Nov. 3||Blood Must Have Blood (Part 2)|| The Sky People return from Mount Weather to Camp Jaha. Clarke chooses not to enter Camp Jaha, and instead leaves on her own.|
Jaha meets A.L.I.E.
|Time on Earth||Date (2150)||Episode(s)||Event|
|Day 137||Jan. 27||Wanheda (Part 1)|| Murphy is released from the lighthouse bunker after 86 days and travels with Jaha from the island back to the mainland. Unknown to Murphy, Jaha has A.L.I.E. with them.|
Jasper causes the death of 3 Ice Nation warriors.
Clarke is captured by Roan.
Bellamy, Monty, Kane, and Indra get trapped looking for Clarke.
|Day 138||Jan. 28||Wanheda (Part 2)|| Bellamy, Kane, Indra, and Monty encounter the survivors of Farm station, including Pike and Monty's mom, Hannah.|
Murphy leaves Jaha, Otan, and A.L.I.E. behind and takes off in a boat with Emori.
Abby and Jackson save Nyko's life by using Mount Weather's medical facilities.
Azgeda marches onto Trikru lands and Clarke is brought before Lexa by Roan.
|Day 145||Feb. 4||Ye Who Enter Here|| A summit is held in Polis to join the Sky People into the Coalition as the thirteenth clan.|
The Ice Nation threatens the summit.
The Ice Nation with help from Emerson sets the self-destruct code on Mount Weather and destroys it, killing 49 Sky People.
|Day 146||Feb. 5||Watch the Thrones|| Nia challenges Lexa to a fight to the death.|
A memorial is held at Arkadia for those who died at Mount Weather.
Pike, Bellamy, and others attempt to leave Arkadia to kill the Grounder peacekeeping army but are stopped and arrested.
Roan, representing Nia, loses the fight to Lexa. However, Lexa spares his life, kills Nia, and makes Roan king of the Ice Nation.
|Day 147||Feb. 6||Watch the Thrones, Hakeldama|| Kane informs Pike that he was voted Chancellor.|
Pike, with nine others, murder the Grounder peacekeeping army.
Clarke and Lexa discover the murdered army.
Jaha returns to Arkadia, with A.L.I.E.
Clarke confronts Bellamy. He arrests her, but Octavia helps her escape.
Lexa declares "Jus no drein jus daun." ("Blood must not have blood.")
|Day 156||Feb. 15||Bitter Harvest|| Roan sends Emerson to Polis as a gift to Clarke. Clarke decides not to kill him and Lexa banishes him.|
Pike's men survey land near a Grounder village. That night they go to clear the village, but Octavia had warned them so the Grounders manage a surprise attack.
|Day 157||Feb. 16||Thirteen|| Lexa celebrates her Ascension Day. Semet interrupts to demand justice for his village. Lexa orders a blockade on Arkadia.|
Clarke goes to Lexa to say goodbye. They end up sleeping together.
Titus accidentally kills Lexa.
|Day 158||Feb. 17||Terms and Conditions, Stealing Fire|| The blockade on Arkadia goes into effect.|
Kane attempts a coup against Pike but is arrested by Bellamy and sentenced to death.
Murphy and Clarke are released from Lexa's room.
|Day 159||Feb. 18||Stealing Fire||Ontari kills the other Nightbloods over night. Lincoln and Sinclair are also sentenced to death. Titus gives Clarke the Flame and kills himself. Clarke leaves Polis. Kane and the rest of the resistance escape, while Lincoln is executed by Pike.|
|Day 160||Feb. 19||Fallen, Nevermore||The resistance arrives in the cave, where Octavia beats up Bellamy. Pike is captured and delivered to the Grounders. A.L.I.E. uses Raven to get Abby to take the chip. Arkadia is taken over by A.L.I.E.. Jasper escapes with Raven and runs into Clarke who arrives in Arkadia. That night, they go to Niylah's trade-post and they manage to un-chip Raven.|
|Day 162||Feb. 21||Demons||The resistance (minus Harper, Miller and Bryan) head back to Arkadia which is now abandoned. Emori arrives in Polis, and is now chipped. Emerson takes Harper, Miller and Bryan and kills Sinclair. Clarke kills Emerson. That night they burn Lincoln and Sinclair's bodies. Bellamy, Clarke, Octavia and Jasper set out to go find Luna.|
|Day 163||Feb. 22||Join or Die||Ontari is now chipped and A.L.I.E. is taking control over Polis. Bellamy, Clarke, Octavia and Jasper find a way to signal Luna, and get sedated. Kane caves and takes the chip.|
|Day 164||Feb. 23||Red Sky at Morning|| Clarke and the others discover that they are on the Floukru oil rig and later ask Luna to help them, to which she refuses due to being a strict pacifist.|
Some of A.L.I.E.'s followers find their way to the oil rig and begin to torture its citizens, including Luna.
Clarke and co. are once again made unconscious and are sent back to dry land.
|Day 165||Feb. 24||Perverse Instantiation (Part 1), Perverse Instantiation (Part 2)|| Jasper reveals to the group that he is chipped and part of A.L.I.E.'s army.|
One of A.L.I.E.'s followers attempts to murder Clarke but is killed by Roan. Roan joins the resistance movement against the AI. They hatch a plan to get into Polis.
Jaha strikes Ontari on the side of the head, making her brain dead.
The battles in Polis and the City of Light take place concurrently.
A.L.I.E. is destroyed, ending the War Against A.L.I.E.
Octavia kills Pike.
|Time on Earth||Date (2150)||Episode(s)||Event|
|Day 165||Feb. 24||Echoes||Sky People and Grounders deal with the repercussions of A.L.I.E. and the City of Light. Azgeda, led by Echo, takeover Polis. Bellamy tries to bargain with Echo, while Abby and Clarke try to save Roan's life. All of the Sky People left in Polis are taken prisoner.|
|Day 166||Feb. 25||Echoes||Echo advises Roan to kill Clarke. Clarke convinces Roan to make Skaikru the 13th Clan in exchange for the Flame. Roan announces that Azgeda will honor Lexa's Coalition.|
|Day 174||Mar. 5||Heavy Lies the Crown||In Arkadia, Clarke, Bellamy, Raven, and Monty brainstorm solution to the radiation problem. Bellamy, Monty, Miller, Bryan, and Harper set out for Farm Station to get a hydro-generator. At Farm Station, they find a group of slaves – to free them, they blow up the hydro-generator. Meanwhile, in Polis, Kane and Octavia are unsuccessful in convincing the Trishanakru ambassador, Rafel, not to challenge Roan. Echo and Abby are also unsuccessful in convincing the injured Roan to delay the ambassador meeting. In the evening, Octavia kills Rafel.|
|Day 175||Mar. 6||Heavy Lies the Crown||The ambassadors meet and Roan announces that Rafel was found dead. Bellamy's group returns to Arkadia with the slaves but lacking the hydro-generator.|
|Day 182||Mar. 13||The Four Horsemen|| The sick Floukru members with Acute Radiation Syndrome (ARS) arrive in Arkadia. All of the Floukru died from ARS, leaving Luna the only survivor.|
Jaha, Clarke and Bellamy are on the search to find the Second Dawn Bunker, but their attempts failed.
Clarke writes down a list of a hundred people who get to live.
The Sky People discovers that Luna is immune to radiation, due to her Nightblood.
|Day 187||Mar. 18||A Lie Guarded|| Abby's group arrives on Becca's Island.|
Nyko is killed by one of the drones.
Abby's group found Becca's Lab in the middle of the island.
The Sky People discover Clarke's list and confronts her, but Jaha manages to settle the tensions.
Roan declares war on both Skaikru and Trikru, leaving Kane and Bellamy as hostages.
Octavia escapes Polis in order to warn her people, she gets stabbed, but she survives.
|Day 188||Mar. 19||The Tinder Box|| Ilian saves Octavia and bring her to Arkadia, where she manages to warn her people about Azgeda.|
As the Ice Nation marches to Arkadia, the Sky People surrounds them and Clarke negotiates with Roan. A deal was finally made.
Ilian burns down Alpha Station.
In Becca's Island, Raven discovers that she has intelligence, due to A.L.I.E. and the EMP.
|Day 189||Mar. 20||We Will Rise, Gimme Shelter|| An angry mob of Sky People attempts to kill Ilian for burning down Alpha Station, but Kane threatens to shoot them if they harm him.|
Roan, Clarke, and Bellamy are delivering hydrazine, but one of them gets emptied after one barrel was pierced by an arrow, during the Trikru attack.
Octavia attempts to kill Ilian, but could not do it.
Clarke arrives on Becca's Island.
Black Rain hits Arkadia, and 18 Sky People die.
At Becca's mansion, a scavenger attempts to kill Emori, but was captured. After Emori claims that this was the man who did terrible things to her and her brother, Otan, Clarke decides to experiment on the scavenger.
|Day 190||Mar. 21||God Complex|| The scavenger dies in the radiation experiment.|
Clarke discovers that Emori lied about the scavenger, and attempts to test the experiment on Emori as punishment but Murphy refuses, forcing Clarke to inject herself with Nightblood instead.
Abby destroys the radiation test chamber.
Jaha discovers that the Second Dawn Bunker is in Polis and finds it successfully.
|Day 194||Mar. 25||DNR|| Jaha makes an announcement about the Second Dawn Bunker. The Sky People decides to leave Arkadia and head to the bunker.|
Trikru attempts to assassinate Roan, but fails.
|Day 195||Mar. 26||DNR||Jasper, Riley, Harper and some of other Sky People decides to stay behind at Arkadia. Monty decides to stay with them, in case they change their minds.|
|Day 197||Mar. 28||Die All, Die Merrily|| The Final Conclave begins at Polis.|
Roan and Luna are killed in the battle.
Octavia wins the Conclave, but decides that all of the clans share the bunker equally.
|Day 198||Mar. 29||The Other Side|| Jasper, Riley, and some of the other Sky People at Arkadia, commits suicide.|
Monty and Harper leaves Arkadia to find the rest of their friends.
|Day 199||Mar. 30||The Chosen||The Second Culling takes place at the Second Dawn bunker.|
Monty and Harper reunites with Bellamy and Clarke's group.
Group led by Bellamy and Clarke make their way to Becca's island.
|Day 200||Mar. 31||Praimfaya|| Praimfaya destroys Polis.|
Clarke sacrifices herself to help her friends escape Praimfaya.
Bellamy Blake, Raven Reyes, Monty Green, Harper McIntyre, John Murphy, Emori, and Echo escape in a rocket to the Go-Sci Ring.
Praimfaya renders Earth uninhabitable.
|Time on Earth||Date (2156)||Episode(s)||Event|
|Day 2,399||Apr. 7||Praimfaya|| Radiation levels have been at a survivable level for over a year, yet neither those in the bunker or space have returned to the ground.|
Clarke tries to radio Bellamy and the others in space.
Clarke and Madi witnesses the Gagarin land on Earth.
|Time on Earth||Date (2150)||Episode(s)||Event|
|Day 242||May 12||Eden||42 days after Praimfaya, Clarke emerges out of the ground and heads to Polis.|
|Day 246||May 16||Eden, Red Queen|| Clarke arrives to the ruins of Polis. She tries to dig to the bunker but is unable to reach it. She later heads to the ruins of Arkadia but is unable to find food or water. |
In the bunker, Octavia joins the delegates in an assembly where she resolves a feud between two different clans. They hear Clarke's digging, so Marcus and Abigail put on their suits and try to get to her, but the door doesn't open due to the Polis tower collapsing ontop of the bunker. The overpopulation of the bunker will inhibit them to survive for longer than five years. Kara Cooper stages a coup with her fellow Skaikru to take the food supply for themselves. Octavia, along with the help of Jaha, manage to open the door to the farm and stop the coup. Jaha dies of blood loss. For the guilty, their punishment is to fight to the death to earn their freedom like gladiators.
|?||?||Eden||Clarke goes out searching for resources but eventually ends up exhausted in a desert. Following a bird, she finds a green valley.|
|Day 258||May 28||Eden||58 days after Praimfaya, Clarke is staying within a village in the valley when she encounters a Nightblood child named Madi.|
|Time on Earth||Date (2156)||Episode(s)||Event|
|Day 2,399||Apr. 7||Eden, Praimfaya|| 6 years and 7 days after Praimfaya, Bellamy's group is continuing to try to figure out how to descent back to Earth. Murphy notices something new in Earth's orbit: the Eligius IV. A couple hours later, the group watches a dropship decent from the mothership towards Earth.|
On the ground, Clarke and Madi witnesses the Gagarin land. After ordering Madi to hide, Clarke watches the Gagarin passengers explore the ground. A couple of them find Madi. Clarke and Madi kill the two, but the gunshots give away to the Gagarin passengers that they are not alone.
|Day 2,401||Apr. 9||Sleeping Giants|| 2,201 days after Praimfaya, Bellamy's group heads to the Eligius IV to get a hydrazine fuel. There, they found out that the passengers onboard are prisoners. One of them wakes up from cryo-sleep and attacks them, only to be killed by Bellamy. Raven and Murphy stays behind to guard the prisoners, who are in cryo-sleep, while Bellamy's group finally goes back to the ground.|
On the ground, Clarke and Madi escapes from the prisoners, after killing two more of them. After ordering Madi to hide, Clarke gets captured by the prisoners, led by Charmaine Diyoza. Diyoza interrogates Clarke.
After arriving on the ground, Bellamy's group are held gunpoint by two prisoners, but Madi saves Bellamy's group and kills two prisoners. Later, after the prisoners tortures Clarke, Bellamy intervenes and makes a deal with Diyoza to spare Clarke's life or else all the 283 prisoners in the ship would die.
In the bunker, Kane prepares to fight against others for his freedom in the gladiator ring, but after killing his opponents, he is forced to fight again tomorrow.
|Day 2,402||Apr. 10||Pandora's Box|| Bellamy negotiates with the prisoners, in order to get them to open the bunker.|
Clarke and Bellamy opens the bunker, with the help from the prisoners. They manage to help many people be released from the bunker.
Diyoza and the prisoners betray Wonkru, and opens the Cryo-pods back on Eligius IV, releasing all the prisoners onboard. The prisoners holds Kane and Abby hostage as they escape back to Eligius IV and the Shallow Valley. Enraged, Octavia declares war on Diyoza and the prisoners.
|Day 2,403||Apr. 11||Shifting Sands|| Octavia leads her people towards the Shallow Valley, along with Bellamy and Clarke.|
Meanwhile at the Shallow Valley, Diyoza forces Abby and Kane to help some of the sick prisoners.
Murphy escapes with the help from Miles Shaw, while Raven stays behind. Later, Murphy reunites with his friends at the Shallow Valley, but due to the shock collar around his neck, Murphy and Emori decides to stay behind.
Diyoza, Shaw, and Paxton McCreary flies on the Gagarin and fires a missile at the Wonkru camp.
In the desert, twelve of the Wonkru members die, due to one being killed by parasitic worms and eleven being killed by the glass-sharped sandstorm.
|Day 2,404||Apr. 12||Shifting Sands, Exit Wounds|| The next morning, Octavia decides to retreat. Then, Madi and the group arrives. Madi reunites with Clarke, and Bellamy reunites with Echo, whom Octavia is unhappy to see.|
Later, in Polis, Octavia threatens to banish Echo again for her past actions. However, Octavia made a deal with Echo and her friends to allow Echo to infiltrate Diyoza's ship to get access to the ship's computer, in order to lift up her banishment.
Murphy and Emori kills two prisoners and captures McCreary.
Some of the Wonkru members defect to the Gagarin, along with Echo, but Cooper shoots at the defectors, while the remaining defectors arrive at the ship, but are put into shock collars.
Madi comes to Octavia, revealing to her that she is in fact, born a true Nightblood. Madi becomes part of Wonkru.
|Day 2,405||Apr. 13||Acceptable Losses|| The next day, Diyoza welcomes the defectors into the village in Shallow Valley.|
Madi begins to take Wonkru classes in Polis.
Clarke and the others discovers that Octavia and Cooper are breeding the parasitic worms to use as weapons against Diyoza and the prisoners. Clarke and the others later confronts her.
Echo exposes Shaw's treachery to Diyoza, in order to send the ship's system transmits signal to the others in Polis.
In Polis, Clarke and the others manage to get the access to the ship's computer systems.
|Day 2,406||Apr. 14||Acceptable Losses, How We Get to Peace|| In the Shallow Valley, Abby discovers that Diyoza is pregnant.|
A badly-beaten Shaw is put in the shock collar and is held with other defectors for his treachery.
In Polis, Clarke has a plan to sabotage Wonkru's plan for war, by using the worms to kill Cooper to make it look like an accident, to allow Indra to kill the worms.
Meanwhile, Abby manages to give a successful medical treatment on the prisoners.
After Murphy reveals to McCreary that Diyoza didn't trade Raven for him and left him to die, McCreary decides to help Murphy and Emori get Raven back, and brings them to the village as captives.
Octavia has Clarke arrested for murder and sentences her to death. Bellamy puts Octavia in a coma to prevent her from killing Clarke, and sending the worms' eggs to the Shallow Valley.
|Day 2,407||Apr. 15||Sic Semper Tyrannis|| In the Shallow Valley, Echo, Emori, Raven, and Murphy devises a plan to cause a fight between Diyoza and McCreary's group and escape with the defectors.|
Back in Polis, with Octavia in coma, Indra announces to Wonkru that Octavia is sick and plans to lead them to Shallow Valley peacefully, without war, but Miller opposes this, saying that Wonkru should follow Octavia's plan to march for war. Due to this, Bellamy and Indra plans to make Madi a new Commander, which Clarke opposes.
Meanwhile, in the Valley, Murphy reveals to McCreary that a medical treatment helped cure Diyoza's people, causing McCreary and his group to go against Diyoza's leadership. Later at night, as McCreary and his people confronts Diyoza and her group, Murphy causes a fight between two groups of prisoners. Raven, Murphy, Echo, Emori, and the defectors escape with Kane, Shaw, Diyoza and her group, while McCreary and his people take control, with Abby being held as hostage.
As the Ascension ceremony begins in Polis, Clarke escapes from her chains, with the help from Niylah. Meanwhile, during the Ascension ceremony, Madi is implanted with the Flame. Clarke tries to kill Octavia, but Octavia convinces Clarke that she will help her stop the Ascension. Later, Octavia has Gaia, Indra, and Bellamy arrested.
|Day 2,408||Apr. 16||Sic Semper Tyrannis|| The next morning, in the Shallow Valley, with McCreary and his group in control, he announces that he will kill their enemies and cure his people.|
In Polis, Clarke and Madi escapes to the Valley, unaware that McCreary has taken control. Meanwhile, Octavia sentences Gaia, Indra, and Bellamy to fight in the arena. As she closes the door, she sheds a tear.
|Day 2,409||Apr. 17||The Warriors Will|| In Polis, at the Second Dawn Bunker, Monty shows Octavia how the plants and algae works in the hydrofarm.|
While in the Rover, Madi discovers what happened to Becca in her flashbacks through the Flame.
|Day 2,410||Apr. 18||The Warriors Will|| Clarke and Madi arrives in the Shallow Valley, and discovers that McCreary is now in control.|
In Polis, at the Second Dawn Bunker, as Gaia, Indra, and Bellamy fight in the arena, Monty and Harper interrupts and shows Wonkru that the hydrofarm is working again, and by using the same techniques and with algae, it'll process enough food to feed everyone, and grow crops in the wasteland. This causes Wonkru to go against Octavia. However, Octavia burns down the hydrofarm.
In the Shallow Valley, Clarke and Madi finds Abby unconscious.
In Polis, Octavia leads Wonkru to the Shallow Valley to march for war. Gaia, Indra, Bellamy, Monty and Harper joins along with Wonkru.
- ↑ http://the100writers.tumblr.com/post/98838898633/if-it-isnt-spoilery-can-you-state-when-the
- ↑ http://the100writers.tumblr.com/post/108018662568/what-date-does-unity-day-fall-on-id-like-to-know
- ↑ http://kimshum.tumblr.com/post/113897116141/hi-i-read-somewhere-that-only-52-days-had-passed
- ↑ http://www.ew.com/article/2015/07/10/comic-con-100-panel
- ↑ http://kimshum.tumblr.com/post/140232269186/hello-there-i-was-just-wondering-about-how-long