Continuity mistake: While Clarke and Lexa are kissing, Clarke removes the neck strap of Lexa's blouse. In a subsequent shot of them kissing, Lexa's bra strap is back on. It disappears again as they move towards the bed.
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.