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Based on the young adult novel of the same name, this television series is set nearly a century into the future, during a time when what is left of humanity lives high above the Earth on a space station called the Ark. The Ark though is slowly dying, and the remains of humanity will run out of air in a matter of months if they don't do something drastic.

In order to offer the human race their best chance at survival, the governing council sends 100 juvenile prisoners down to the likely radiation soaked planet that used to be humanity's home. The teenagers are outfitted with monitoring bracelets so the Council can determine whether the ground is hospitable. A stowaway who attempts to kill the Chancellor before muscling his way on board the drop ship heading for home complicates matters for everyone.

What follows is a literal battle for survival on Earth and a political power struggle on the Ark. While the teens attempt to fashion shelters, explore their surroundings, and give in to hormonal urges, they discover that they may not be alone on the planet after all - some vestiges of humanity may have survived, and they might not be happy to share their planet with a group of kids who just dropped from the sky. The adults on the Ark spend their time trying to find a way to extend the life of the space station they inhabit - vacillating between keeping the population in the dark to the direness of the situation and telling them everything they can. Everyone on the Council appears to have their own agenda, jockeying for power and authority as often as the teens on the ground have emotional outbursts.

The series is a look at what humanity does when its options for survival are stuck between a rock and a hard place.

Thursday 9:00 PM et/pt on The CW
5 Seasons, 60 Episodes
March 19, 2014
Cast: Eliza Taylor, Paige Turco, Bob Morley, Marie Avgeropoulos
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The 100 Full Episode Guide

  • Clarke struggles to survive on a desolate, scorched earth while her friends in space come across a long-awaited beacon of hope.

  • It's a race against the end of the world as Praimfaya arrives forcing our heroes to make impossible decisions to ensure their survival.

  • Jaha and Kane disagree over how to handle their grim reality. Meanwhile, Clarke leads a group to save a friend.

  • Clarke faces the consequences of her fateful choice.

  • Jasper and Bellamy embarl on a quest. Meanwhile, Clarke fails to establish peace after word of Jaha's discovery spreads.

  • Following a discouraging discovery, Clarke and Abby must decide how far they're willing to go. Meanwhile, Jaha finds a lead to the mysterious Second Dawn.

  • Clarke’s arrival on the island takes an unexpected turn. Meanwhile, Bellamy attempts to avoid further damage in Arkadia.

  • Clarke and Roan must work together in dangerous territory to deliver a vital asset to Abby and her team.

  • Clarke pleads with a former allied force in an effort to avoid a war and ensure the survival of her people.

  • Arkadia and Polis are plagued by distrust and mounting problems among leadership. Meanwhile, Abby leads a team to a distant location hoping to find answers.

  • Jaha leads Clarke and Bellamy down a path to possible salvation while tension boils over in Arkadia and Polis.

  • The burden of leading weighs heavily upon Clarke and Bellamy when different challenges force them to determine who will live and die.

  • Clarke and her friends don't know which direction to go after the fate of the world is revealed.

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The 100 Video Clips & Extras

Eden Preview (01:23) The 100 | Season 5 - Lindsey Morgan Interview | The CW Clip (02:04) The 100 | Season 5 - Eliza Taylor Interview | The CW Clip (01:32) The 100 | Only Survivors | The CW Clip (01:11) The 100 | Season 5 - Bob Morley Interview | The CW Clip (01:29) The 100 | Serpent Trailer | The CW Clip (01:11) The 100 | Season 5 Official Extended Trailer | The CW Clip (03:59) The 100 | Comic-Con 2017 Season 4 Recap | The CW Clip (05:53)