When Castle's novel "Heat Wave" is turned into a movie, actress Natalie Rhodes, shows up at Beckett's invitation to better understand the character she's going to play. Meanwhile, the threesome investigate the murder of a high-class matchmaker. Guest-starring Laura Prepon (That 70s Show, October Road) as Natalie Rhodes, an actress who has been cast to play Nikki Heat in the film-adaptation of Castle's first novel, "Heat Wave".
