100 years in the future, when the Earth has been abandoned due to radioactivity, the last surviving humans live on an ark orbiting the planet — but the ark won't last forever. So the repressive regime picks 100 expendable juvenile delinquents to send down to Earth to see if the planet is still habitable.
The best episode of "The 100" season 4 is "Echoes", rated 7.6/10 from 4232 user votes. It was directed by Dean White and written by Jason Rothenberg. "Echoes" aired on 2/1/2017 and is rated 0.0 point(s) higher than the second highest rated, "Heavy Lies the Crown".
Clarke and her friends struggle with how to proceed after the fate of the world is revealed.
Director: Dean White
Writer: Jason Rothenberg
The burden of leading weighs heavily upon Clarke and Bellamy when different challenges force them to determine who will live and die.
Director: Ed Fraiman
Writer: Justine Juel Gillmer
Jaha leads Clarke and Bellamy down a road to possible salvation while tensions rise in Arkadia and Polis.
Director: P.J. Pesce
Writer: Heidi Cole McAdams
Continued struggles with leadership and trust in Arkadia and Polis take violent turns while Abby leads a team to a distant location hoping to find answers.
Director: Ian Samoil
Writer: Kim Shumway
Clarke makes a desperate plea with a former allied force in an attempt to avoid a war and ensure the survival of her people.
Director: John F. Showalter
Writer: Morgan Gendel
Clarke and Roan are forced to work together when they are tasked to deliver a dangerous but crucial asset to Abby through enemy territories.
Director: Dean White
Writer: Charmaine DeGraté
Clarke's arrival on the island quickly takes a turn for the worse. Meanwhile, Bellamy tries to avoid further tragedy in Arkadia.
Director: Tim Scanlan
Writer: Terri Hughes, Ron Milbauer
After a disappointing discovery, Clarke and Abby question how far they're willing to go. Meanwhile, Jaha finds a lead to the mysterious Second Dawn.
Director: Omar Madha
Writer: Lauren Muir
Jasper and Bellamy go on a quest. Meanwhile, Clarke struggles to keep the peace after word of Jaha's discovery spreads.
Director: Mairzee Almas
Writer: Miranda Kwok
Octavia fights in the final battle for her people's survival, but not everyone is willing to play fair.
Director: Dean White
Writer: Aaron Ginsburg, Wade McIntyre
Clarke faces the consequences of her fateful choice.
Director: Henry Ian Cusick
Writer: Julie Benson, Shawna Benson
Jaha and Kane disagree over how to handle their grim reality. Meanwhile, Clarke leads a group to save a friend.
Director: Alex Kalymnios
Writer: Aaron Ginsburg, Wade McIntyre
It's a race against the end of the world as Praimfaya arrives forcing our heroes to make impossible decisions to ensure their survival.
Director: Dean White
Writer: Jason Rothenberg