A dead woman leaves clues indicating that the Tripler Killer aka 3XK is back after a four year hiatus. Castle and Beckett play a deadly game of wits with the killer to prevent more killings.

Starring:

Jon Huertas, Nathan Fillion, Ruben Santiago-Hudson, Seamus Dever, Stana Katic, Susan Sullivan, Tamala Jones

Genre:

Comedy, Drama, Short