The 100 2×16 “Blood Must Have Blood Pt. 2” (Season Finale) – The journey to the City of Light continues, and Jaha (Isaiah Washington) makes a move that shocks Murphy (guest star Richard Harmon). Clarke (Eliza Taylor) receives help from an unexpected source, a visitor surprises Octavia (Marie Avgeropoulos), and Lincoln (Ricky Whittle) gets his revenge. Meanwhile, at Mount Weather, Cage (guest star Johnny Whitworth) moves forward with his mission and Bellamy (Bob Morley) and the group struggle to break free. Paige Turco, Henry Ian Cusick, Lindsey Morgan and Christopher Larkin also star. Dean White directed the episode written by Jason Rothenberg (#216).