White Collar Season 3 Episode 5 (07/05/11)
Neal, Peter and Jones go undercover at a bachelor auction to nail a black widow that has made her way to New York to claim her next rich victim.
Peter ends up her lucky bachelor, and balanced his undercover responsibilities with a very unhappy Elizabeth who was understandably displeased with sharing her husband with a potential killer.
The undercover work gets more serious when Peter proposes, exposing her partner, the bachelor auction organizer and host.
To make it up to Elizabeth, Peter organizes the intimate wedding he and Elizabeth never had, with Mozzie officiating and Neal acting as their witness.