Donovan reverts to his old ways. K.C. and Moses bond. Chase and Cooper realize critical truths about the vision that haunts them both.

Close to freedom, Chase must first navigate prison politics, face a devious warden and endure rude awakenings.

Two rogues appear on the island and cause trouble. The group's memories begin to return, and each one proves brutal -- including a heinous shooting.

While K.C. agonizes over the horrors of her own history, Chase and Cooper uncover a shared one. Taylor finds herself in a distasteful situation.

The group argues over next steps. K.C. has a traumatic encounter with Brody, who sets the others on edge with his increasingly volatile behavior.

Ten people wake up on an enigmatic island missing their memories. Instead of answers, they find danger -- in the water and in one another.

Waking in strange surroundings, Chase learns the disturbing truth about the island, and what she and the others are doing there.