David Ackert

Three days before Christmas the body of a bearded man in a tailor-made Santa outfit turns up in a sewer; Brennan visits her father in prison and plots a nontraditional holiday reunion.

Claire goes to her Aunt Sarah's, where an intriguing meeting occurs; a rabbi counsels Nate.

Horatio and Delko search Miami to bring down the Mala Noche gang once and for all after the murder of someone very close to them. However, their quest is jeopardized when the Feds seize the CSI lab with the intent to close it for good, based on the tip from the mole inside. When the mole is finally revealed to the entire lab, the news sends the remaining CSIs reeling.

The squad's temporary boss cares more about golf than solving crimes; Ortiz and Murphy suspect a man of stabbing his young Muslim bride to death; Bale recommends Sipowicz as new squad commander for the precinct.

Jonas and the team must travel through enemy territory to bring a bride to her groom, preserving a truce between two warring Afghan tribes; Kim and Bob try to expose a man linked to terrorists.

Holly feels pulled in different directions when Henry temporarily moves into Vince's apartment; Lauren convinces Val to try speed dating.