Jill Hennessy and Jerry O'Connell from "Crossing Jordan" and Josh Duhamel and Vanessa Marcil from "Las Vegas" will appear in both episodes. The crime begins when a Las Vegas showgirl appears in the morgue in Boston. The only clue is an employee ID From the Montecito Casino, leading Dr. Jordan Cavanaugh (Hennessy) to call Danny McCoy (Duhamel) for an assist. Danny comes to Boston to help Jordan as Detective Woody Hoyt (O'Connell) goes to Las Vegas to work with Sam Marquez (Marcil). Sexual tension ensues.