Tuck, who plays vampire-human liaison Nan Flanagan, will guest-star as a wealthy museum benefactor who becomes a suspect in a murder investigation, as TVLine.com first reported.
The Killing's Kristin Lehman also guest-stars in the same episode as a sexy art insurance investigator who joins Castle (Nathan Fillion) and Beckett (Stana Katic) on the investigation that involves the theft of a sculpture. She also sets her sights on Castle, much to Beckett's chagrin.
Castle returns Monday, Sept. 19 at 10/9c on ABC.
Entertainment Plaza - TV, Movies, Sports, Music
Babe Of The Month
Hunk Of The Month