Plot

When a talk show host tells Castle someone wants him dead and dies the next day, Castle asks Lanie to prove his death was a homicide.

When Castle appeared on his show, comedian and TV star, Bobby Mann asks Castle for help, claiming to fear for his life. A few hours later, he dies from cardiac arrest. Castle, suspecting foul-play, implores Medical Examiner Lanie taking a closer look at the autopsy report. Running more that the standard tests, a crafty poisoning requiring knowledge of Bobby's medication is discovered. The night before, he had visited his first wife, Barbara, and later, he went to a Comedy Club. He was also blackmailed with pictures of him and an intern, but by whom? Castle enjoys a hot affair with actress Ellie Monroe, who wants the part of Nikki in the upcoming Heat Wave movie. More studio politics increase the suspects lists while alibis are checked.—KGF Vissers

When Castle appears on a late-night talk show to promote his book, Heat Wave, legendary host Bobby Mann leans in during a commercial break and whispers, "They want me dead." When Mann dies later that night, seemingly of natural causes, Castle has to convince Beckett that there was foul play. During the investigation, Castle is seduced by a Hollywood hottie, who was the other guest on Bobby Mann's show the night he died.—ABC Publicity