http://en.wikipedia.org/wiki/Peter_Burke_%28White_Collar%29#Peter_Burke A no-nonsense federal agent in the FBI's White Collar Crime Unit, Peter believes in earning success the old-fashioned way, with perseverance and hard work. Adhering to a 'by the book' approach to law enforcement, he has high moral and ethical standards, although having Neal assigned as his CI occasionally makes him more willing to bend rules and look at 'grey areas' for opportunities to catch the real bad guys.
Having completed a CBA at college, Peter entered into the FBI's recruitment program not long after. He initially met his now-wife, Elizabeth, during an investigation of a robbery at the gallery where she worked. After putting her under surveillance 'to make sure [she] wasn't seeing anybody else' Peter eventually asked her out, and they have been married for ten years as of the start of Season 1. Peter's lacking ability in flirting often puts him in danger while he is undercover and needs to charm a woman. Funnily, it is Elizabeth who usually help him on flirting other woman (most likely because she knows exactly how deep is Peter's love for her).
It took him years of diligent investigation, along with the steadfast support of his loving wife, Elizabeth, to finally catch elusive white-collar criminal Neal Caffrey. He has, to date, apprehended Caffrey three times. The second apprehension, after Neal broke out of a maximum security prison, led to the deal being struck that gave Neal some freedom in exchange for wearing a tracking anklet and working for the FBI to catch other white collar criminals.