Murphy returns to camp claiming to have been held captive and tortured by the Grounders, and Clarke and Bellamy have very different opinions on how to handle his return. Octavia sneaks away to find Lincoln and returns with a serious warning for the 100. Meanwhile, a mysterious virus strikes camp forcing many to be quarantined, and Jasper pulls off a heroic move.
Elenco: Eliza Taylor , Bob Morley , Marie Avgeropoulos , Lindsey Morgan , Paige Turco , Christopher Larkin , Isaiah Washington , Henry Ian Cusick , Richard Harmon , Devon Bostick , Ricky Whittle , Thomas McDonell , Alycia Debnam-Carey , Eli Goree , Tasya Teles , Shannon Kook , Zach McGowan , Shelby Flannery , Richard Harmon , Sachin Sahel .