Aaron Keith Braxton

Mulder and Scully suspect that hexcraft is the source of a threat against a doctor's family.

When the girls visit Caroline's father, Martin (recurring guest star Steven Weber), in prison to see him perform in a musical, they tell him their plan to use Caroline's movie money to convert their cupcake window into a dessert bar.

The team members go under cover on a cruise ship in order to locate and disable stolen rockets; as Valentine's Day approaches, Ralph develops a crush.

The CSIs must find who is trying to kill a young, sexy couple just released from jail. Leo and Sienna's illegal activities transformed them from common criminals to media darlings, but now their past is catching up with them. However, after they are released from jail, their past misdeeds catch up with them. Meanwhile, Calleigh's ex-boyfriend from the U.S. Treasury office is assigned to help her on the case.