Plot summary
Jack and the team investigate the disappearance of Alex Stark after his girlfriend reports him missing, and soon learn that Alex didn't own a cleaning business as he said he did, but was actually involved in an illegal gambling operation. Jack goes undercover at a club at which Alex would gamble to find out what happened to him, and ends up being taken hostage by Alex's associate, who becomes convinced that Jack is actually there to kill her. Unfortunately for Jack, his team believes that he has changed his cover story and has no idea he's actually been kidnapped.
Credits
Adapted from Wikipedia contributors, Without a Trace season 5. HTML formatting and reference markers removed.