Continuity mistake: When Clarke gets in Finn's tent with Raven to check on his wound you can see the cut running vertically on his chest, but during the whole previous episode the wound was horizontal.
Kane: Peace with the grounders is the only way we'll survive. Abby: Oh, I don't think they know what 'peace' is. Kane: The Commander does. Abby: She's a child. They're being led by a child. Kane: So are we.