When does T.U.F.F. Puppy return?

T.U.F. Puppy is the American action animated children's television series created by Butch Hartman. It premiered on October 2, 2010, along with Planet Sheen, which premiered a half hour earlier. The show is about a dog named Dudley Puppy, who works as a spy for The Turbo Undercover Fighting Force. Other characters include The Chief, The Chameleon, Bird Brain, Larry, Ollie, Francisco, Zippy, Owl, Bad Dog and Skunk.