When a controversial university professor is found dead in his classroom, Charlie and Rex investigate leads while Jesse goes undercover and soon finds himself in danger.

Madison confronts Strand about his mysterious destination. Meanwhile, Nick, Alicia and others inspect wreckage from a plane crash.

Clarke and Finn are captured by Anya, who forces them to save the life of a victim of the explosion. Meanwhile, Raven deals with her split from Finn, and Kane…

Clarke and Finn come face to face with a new enemy after Lincoln rescues them from Anya, while Bellamy, Raven, Octavia and Jasper deal with a vengeful Murphy. On the…

When a teen opens fire in a police station, Russell is taken hostage.