While investigating the murder of man hired to make dirty bombs that terrorists intend to set off in Miami, Horatio finds the bloody fingerprint of his brother, Raymond, who he believed to be dead. However, when Raymond's son is kidnapped, he emerges from deep undercover and the estranged brothers must work together to save the boy. Meanwhile, while processing a crime scene, an unknown assailant holds a gun to Calleigh's head and, after a deadly confrontation in her gun lab, she is left doubting that she can continue as a CSI.
Quest roles:
Rex Linn(Frank Tripp), Sofia Milos(Yelina Salas), Brian Poth(Tyler Jenson), Holt McCallany(Detective John Hagen), Amy Laughlin, Lance Reddick(FBI Agent David Park), Dean Winters, Armando Valdes-Kennedy(Aaron Peters), Charity Shea, Sticky Fingaz, Matt CedeƱo, Bill Bolender, Alex Feldman(Matt Young), Stephen Ramsey(Staff Sergeant Wayne Stoddard), Adam Chambers(Brandon Miller), Maliabeth Johnson(Tiffany)