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

T.U.F. Puppy is an 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. This takes place in the fictional city of Petropolis, populated by anthropomorphic animals.