The 100: Season 2

While Clarke struggles to make sense of her bizarre surroundings, Lincoln risks his life to save Octavia, and Kane establishes his authority.

Clarke demands answers from President Wallace, Abby performs emergency surgery on Raven, and Octavia resorts to violence to find Lincoln.

Clarke and Anya join forces to escape Mount Weather. Kane issues an order to have Abby brutally punished. Octavia searches for Lincoln.

Clarke faces betrayal. Meanwhile, Bellamy, Finn, Murphy, Sterling and Monroe race against time to save a survivor of the Ark crash, and Raven struggles to cope with her paralysis.

While Kane leads a mission to make peace with the Grounders, Jasper agrees to participate in a risky experiment, and Finn's search for Clarke takes a violent turn.

Tensions run high between Clarke and Finn, and Raven discovers that Mount Weather is interfering with Camp Jaha's communication systems. Meanwhile, Jasper and Monty discover the truth about what's going on at Mount Weather.

As Abby and Jaha each try to establish their authority, Clarke comes up with a plan to stop the Grounders' attack. At Mount Weather, Jasper, Monty, Miller and Harper plan their escape, as Dr. Tsing and Cage conduct deadly experiments.

Camp Jaha butt heads over what to do with Finn, as flashbacks show his and Raven's relationship on the Ark.

The alliance between Camp Jaha and the Grounders is jeopardized when Gustus is poisoned. Meanwhile at Mount Weather, Monty lands himself in hot water.

Clarke and Lexa encounter a new enemy. Bellamy and Lincoln work together to break into Mount Weather. Murphy helps Jaha confront his past. Indra makes Octavia an offer she can't refuse.

Bellamy receives help from an unlikely source after being captured. Meanwhile, Abby fights to stay in control, and Jasper confronts President Wallace.

Clarke is faced with a difficult choice and Raven helps Bellamy navigate Mount Weather as Dr. Tsing begins to harvest the 47, while Jaha and Murphy encounter a stranger on their journey to the City of Light.

Clarke begins to question Lexa's leadership decisions and Indra continues to push Octavia. Meanwhile, at Mount Weather, Jasper steps up into the role of leader, and Cage throws Maya into a life threatening situation.

As Jaha and Murphy encounter a perilous obstacle on their journey, Raven and Wick try to figure out how to disable the acid fog, and Bellamy races against time as his cover is blown.

As the Grounder army prepare to attack Mount Weather, a desperate Cage turns to Dante for help, and Raven and Wick experience a major setback.

After being betrayed by Lexa, Clarke makes a final stand against Mount Weather, while Jaha shocks Murphy as they continue their journey to the City of Light.