NCIS Season 7 Episode 17

USMC lieutenant John Mayne is shot in his car in US park Rock Creek (DC) with his own gun. But according to wife Leah and his military record he went missing, presumed captured after breaking his leg, during a reconnaissance mission in Afghanistan six years earlier with former sergeant Matthew Gontz, now a cab driver, and then captain, present major, Gordon Holcomb. John lived a new life as day-trader Christian Wells, 'remarried a year earlier with unsuspecting Rachel. P.I. Pete Iger was hired to identify Wells from a marathon photo-finish- by Holcomb. The Afghan story proves dodgy.