In a WORLD EXCLUSIVE hitting newsstands today, NATIONAL ENQUIRER investigators nab Dateline NBC’s CHRIS HANSEN cheating on his wife!

Investigative star Chris Hansen – best known for exposing Internet sex perverts on “TO CATCH A PREDATOR” – has been caught in his own cheating scandal with a sexy blonde young enough to be his daughter!

For nearly four months, sources say, the handsome father of two has been cheating on his wife with Kristyn Caddell, a news anchor at NBC affili­ate WPTV in West Palm Beach, Fla.

Hansen and his wife, Mary, 53, live togeth­er in Connecticut and have two sons, but that didn’t stop the “To Catch a Predator” star from being caught in his own web of deceit, say sources.