Castle (2009): Season 2, Episode 9

2 - 9: Love Me Dead

The murder of an Assistant District Attorney thrusts Castle and Beckett into the world of ex-cons and escorts. But when Castle's desire to help a vulnerable call girl endangers the case, Beckett is forced to decide between honoring promises and putting a killer behind bars. Matters are complicated even further when Castle's daughter shares a potentially explosive secret with Beckett instead of her father.