Dheeaba Donghrer

Using a screwdriver and bug spray, MacGyver must find the U.S. government mole who is leaking classified intel to the organization that is trying to take down The Phoenix Foundation. Also, Sarah (Amy Acker) returns to help with the mission, and Nikki (Tracy Spiridakos) reappears, but Mac can't tell which side she's on.

Greg is forced to again contend with the hostile mother and brother of the hoodlum he killed in self-defense several months ago when the CSI team discovers that the brother is involved in a new murder case. (TV-PG)