Episode 75 of "Quantum Leap"
s04e22 A Leap for Lisa
Title: A Leap for Lisa
Director: James Whitmore Jr.
Writer: Donald P. Bellisario
Guest Stars: Roddy McDowall (Edward St. John V), Jamie Walters (Albert Bingo Calavicci / Mirror), Charles Rocket (Commander Dirk Riker), Debbie James (Marci Riker), Jack Stauffer (Flight Surgeon), Terry Farrell (Navy Nurse Lt. Lisa Sherman), Anthony Peck (Judge), Steve Carlisle (Pollack), Jeffrey Corbett (Chip Ferguson), Rich Whiteside (Marine Guard), Jeff Nowinski (Stacker Carpenter), Ivan Gueron (Plumber)
Plot Outline:
Sam leaps into Al Calavicci to prevent the death of his married lover. But when Sam accidentally alters history, and finds out too late about her untimely demise, it could mean the gas chamber for Al and disturbingly a whole new situation at Project Quantum Leap.