(Crossover episode with CSI: Miami, Season 4 Episode 7.)
Horatio Caine follows Henry Darius to New York so that he can keep his promise to a young boy in Miami, but by the time he and Mac are able to locate Darius he has disappeared again, leaving behind six more bodies. A link to the younger sister of one of the victims who was also Darius' hostage turns out to be a dead end, but Mac and Horatio soon find the connection between Darius and his hostage, leading them to a psychiatrist who had treated both.
Casts:
Gary Sinise, Anna Belknap, Sela Ward, Carmine Giovinazzo, Hill Harper, Eddie Cahill, Robert Joy, A.J. Buckley