Butch Hartman's latest animation creation is 'T.U.F.F. Puppy,' a spy genre comedy about a clumsy canine recruited by an undercover organization to protect the town of Petropolis. Dudley Puppy isn't too bright, but he has the physical skills and animal instincts unlike any other. 'T.U.F.F. Puppy' takes to Nickelodeon Saturdays alongside 'Planet Sheen' and a few other notables.