|Appeared on:||Quantum Leap (TV series)|
|Episodes appeared in:||"Her Charm" (Season 2)|
|Character played:||Peter Langly (leapee)|
Mark Harigian appears in a cameo mirror image appearance as Peter Langly, an FBI agent assigned to protect Dana Barrenger, a woman who has testified against her former employer, Nick Kochifos, who's also a notorious criminal and drug dealer, in the Season 2 episode Her Charm". Mark, in addition to his QL appearance, also made an appearance as a fitness trainer in the 1991 film Total Exposure.