Room 147 Castle : Season 6 Episode 16
TV-14 ABC 43m int(0)
Aired: February 24th, 2014 @ 9:00 PM EST on ABC
When a guilt-ridden young woman confesses to the murder of a struggling actor -- knowing details only the killer could know -- Beckett and Castle seem to have an open-and-shut case, until they uncover proof that their suspect couldn’t possibly be the killer. When a second person confesses, equally convinced they committed the murder, the team realizes the case is far more mysterious than they thought.