CASTLE - "Mr. & Mrs. Castle" - Castle and Beckett investigate the murder of a cruise ship entertainer, only to find themselves trapped at sea with the killer. "Mr. & Mrs. Castle," the winter finale, will air on MONDAY, NOVEMBER 23 (10:01-11:00 p.m., ET/PT) on the ABC Television Network. (ABC/Mitch Haaseth)
TARIN PRATT, NATHAN FILLION, DENNA THOMSEN