The 100

In the season premiere, three months have passed since the tragedy at Mt. Weather. With a bounty on Clarke's head, Bellamy and Kane lead a team into Grounder territory to save her.

Bellamy and Kane risk life and limb to rescue Clarke. In an attempt to avoid worrying about her daughter, Abby focuses on whether to open Mount Weather as a medical facility.

Clarke wrestles with a decision. Bellamy learns that something isn't what it seems. Meanwhile, Murphy plots to betray his former Chancellor.

Clarke discovers the mastermind behind a devious plan, while Kane struggles to keep the peace. Meanwhile, Jasper's grief drives him to reckless behavior. BRENDA STRONG guest stars.

Clarke's hope for peace is dashed by a new threat. Raven become a target. Meanwhile, Murphy is running a dangerous con.

Clarke is torn between vengeance and mercy. Meanwhile, Kane and Octavia work together to avert a disaster, and Abby continues to worry about Raven.

While Lexa struggles to maintain peace between the clans, Clarke uncovers a strange, game-changing truth. And a flashback takes us into the darkness of humanity's past.

Searching for a peaceful way to handle things, Kane soon realizes that he may be forced to resort to drastic measures. Meanwhile, Pike suspects a leak within the walls of Arkadia.

Clarke discovers a shocking truth, and Octavia is forced to make a decision that could have devastating consequences. Meanwhile, Kane and Abby share a moment.

Jaha employs a terrifying new method to convince Abby to join his cause. Meanwhile, Bellamy is hit with a hard truth and Monty finds himself in trouble.

Alie (ERICA CERRA) forces Raven's dark side to come out, while Jasper's anger continues to grow. Meanwhile, Octavia wrestles with her place in the world.

Jaha returns to Polis, and Murphy has a surprise encounter. Meanwhile, Octavia uncovers a clue.

Clarke is on a mission that could change everything. Meanwhile, Murphy gains insight that might prove useful in ensuring his survival. Lastly, Kane reaches a breaking point.

Clarke, Bellamy, Octavia and Jasper hit a tragic roadblock. Meanwhile, Raven and Monty make an important discovery.

In part one of the two-part season finale, Clarke finds hop in the most unlikely place. Meanwhile, Alie's master plan comes together.

In the second half of the two-part season finale, everyone prepares for a final showdown as they begin to face the reality of their tragic situation in the epic and mind-bending conclusion.