With oxygen levels in the Ark critically low, Marcus Kane creates a plan to suffocate 320 people to allow more time for those remaining. Before the plan can be enacted, Abby Clarke outs his plan, and surprisingly, hundreds of people volunteer to be sacrificed so their loved ones can live longer. In a heartbreaking twist, this proved to be a needless killing because those on the Ark did not know that Earth was livable.
“We Are Grounders (Part 2)” (Season 1, Episode 13)
In order to save the delinquents from the Grounders attack at the Dropship camp, the group uses the ship’s rockets to incinerate the Grounders. While this is happening, Chancellor Jaha leads the Ark to Earth.
“Spacewalker” (Season 2, Episode 8)
Clarke goes missing at the end of Season 1, and Finn desperately attempts to find her. In the process, he massacres the people of the Tondc village, and in order to avoid war, the Grounders demand he be killed in retribution. But before he can be executed, Clarke mercy kills him with Raven’s knife.
“Blood Must Have Blood (Part 2)” (Season 2, Episode 16)
With the Mountain Men killing Sky People for their bone marrow, Clarke and Bellamy make the difficult decision to irradiate the compound. This kills every Mountain Man inside, but it ultimately saves their own.
“Stealing Fire” (Season 3, Episode 9)
With Charles Pike as the new chancellor of Arkadia, Pike enacts a war against the Grounders and orders that Kane, Lincoln and Sinclair be executed for rebelling against his rule. After helping Kane and the others escape, Lincoln turns himself in to protect the other Grounder prisoners in Arkadia, and Pike executes him.
A.L.I.E. is threatening to take over the world, so Clarke has Ontari’s nightblood pumped into her body so that she can take the Flame and go into the City of Light. Once she finds the kill switch, Clarke learns that the group is still in danger due to nuclear radiation.
“A Lie Guarded” (Season 4, Episode 4)
With Praimfaya on the way, the group decides to patch up the Alpha Station to ride out the storm. They only have enough supplies to support 100 people, so Clarke makes a list of who can stay in the station when the time comes. When Monty tells everyone in Arkadia about her plan, Jaha announces that they will use a lottery system to determine who will be chosen.
The Final Conclave
“Die All, Die Merrily” (Season 4, Episode 10)
Praimfaya is only days away, and the clans have one final conclave to determine which group will survive the storm in the Second Dawn Bunker. As the champion for Skaikru, Octavia wins the conclave and announces that all clans will share the bunker.
“Praimfaya” (Season 4, Episode 13)
This season finale episode features the 13 clans deciding to share the Second Dawn Bunker evenly, with each group being allotted 100 beds. Meanwhile, at Becca’s lab, Raven and the remaining survivors prepare the rocket to take them back to what’s left of the Ark. Meanwhile, the radiation wave is approaching rapidly, and the group must leave Clarke behind before she can return from turning on power in the Ark.
The CW’s post-apocalyptic hit series The 100 is returning for Season 5, so now is a perfect time for fans to brush up on the last four seasons.
The new season will pick back up six years after the end of Season 4, with Clarke and fellow nightblood Madi struggling to survive on the last patch of livable earth after the radiation wave hit.
Are you a fearless leader like Bellamy or are you compassionate like Clarke? Find out!
With new enemies threatening to take over the “oasis” and the return of the Clarke’s people from the Ark and the bunker, this new season promises to answer the many questions posed last season. It’s also sure to present new and exciting challenges for all our favorite characters.
Click through the gallery above to see the most memorable moments over the first four seasons.
The 100, Season 5 Premiere, Tuesday, April 24, 9/8c, The CW