3. The Brady Bunch
Episode:"Kelly's Kids" Even hardcore fans would admit that the fifth season of the Brady Bunch was not up to the standards of the past, having exhausted most sitcom conventions in its first four seasons. However, the barrel was truly scraped with this lame attempt of the producers to launch a spin-off series. The Brady family are barely in this one, with most of the screen time given over to the Kelly's, a whole new obnoxious family we've never met before that have moved in next door to the Bradys with a clutch of adorable ethnically-mixed adopted kids. Ken Berry survived this disaster and went on to become the incompetent son in the execrable sitcom "Mama's Family". Even Cousin Oliver was better than this.