Murphy (guest star Richard Harmon “Bates Motel”) returns to camp claiming to have been held captive and tortured by the Grounders, and Clarke (Eliza Taylor) and Bellamy (Bob Morley) have very different opinions on how to handle his return. Octavia (Marie Avgeropoulos) sneaks away to find Lincoln (guest star Ricky Whittle) and returns with a serious warning for the 100.
Meanwhile, a mysterious virus strikes camp forcing many to be quarantined, and Jasper (Devon Bostick) pulls off a heroic move. Paige Turco, Thomas McDonell, Isaiah Washington, Henry Ian Cusick and Chris Larkin also star. Omar Madha directed the episode written by T.J. Brady & Rasheed Newson.
Source: The CW