The 100 3×12 “Demons” – Jaha (Isaiah Washington) returns to Polis, and Murphy (Richard Harmon) has a surprise encounter. Meanwhile, Octavia (Marie Avgeropoulos) uncovers a clue. Bob Morley, Devon Bostick, Lindsey Morgan and Christopher Larkin also star. P.J. Pesce directed the episode written by Justin Juel Gillmer (#312). Original airdate 4/21/2016.