(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.
Quest roles:
Robert Joy(Sid Hammerback), Andrew St. John, James Badge Dale, Lisa Canning, Kat Dennings, David Caruso, Rick Hoffman, Michael Gross, Robyn Lively, Evan Parke, Alicia Coppola, Peyton List(Alexa Endecott)