The Flintstones S01 E28 Fred Flintstone: Before and After

"Yabba Dabba Doo!"

Fred agrees to appear in a before-and-after weight reduction commercial, but is humiliated to learn that he is the before example. An offer of $1,000 if he can drop twenty-five pounds in a month fails miserably, as does every other diet plan, until an overeaters group takes him on as a challenge.