A confession usually means an open and shut case, but not this time. Not on an upcoming episode of Castle.

Just when Rick and Kate think they can head home early and continue planning their upcoming nuptials, someone else confesses to the same killing and knows just as many details as the first person they believed to be the murderer.

It all leads to a twisted mystery in Castle Season 6 Episode 16, as teased below. Check out these photos from "Room 147" scheduled to air Monday, February 24th on ABC.

Don't forget, you can always watch Castle online here at TV Fanatic. Now click around and get excited!