Castle, Season 2, Episode 20, The Late Shaift
The Late Shaft
Castle appears on a late-night talk show to promote his new book, Heat Wave. In a commercial break the host Bobby Mann whispers to Castle, "They want me dead." The next day he is found dead of natural causes and its up to Castle to convince Beckett to investigate the case as a murder. Meanwhile, Castle is seduced by Ellie, the guest star to appear on the show the night he died.