"Da Flippity Flop" is the nineteenth episode, 152nd overall, and season finale of the ninth season of American Dad! The episode aired in the United States on May 5, 2013, on Fox's Animation Domination lineup. It was written by series co-creator Matt Weitzman and directed by Rodney Clouden.
The episode centers around Klaus Heissler swapping bodies with Stan Smith after Klaus is unable to retrieve his human body, and Stan must find a way to regain control of his body before Klaus ruins it. A subplot involves Roger renovating the Smiths' attic into a health club and attempting to pressure Steve into a long-term membership.