When the Castle crew heads to Hollywood in May, awaiting them will be new actors in the roles of Javier Esposito and Kevin Ryan.
Chillax! Fan faves Jon Huertas (Esposito) and Seamus Dever (Ryan) are not being replaced. Rather, two new hunks will be playing their Hollywood-ized alter egos in the movie adaptation of Rick Castle's Heat Wave book.
Actor Ryan Deal — who starred in the 2007 Ghost Whisperer online spin-off, The Other Side, will be playing Raley — the alter-universe Ryan, while fresh face Justice Gamble is Ochoa, the movie's take on Esposito. Laura Prepon, who previously appeared as actress Natalie Rhodes/Nikki Heat, is not expected to reappear in this episode.
Source: TV Guide