A man claiming to be Carol Brady's long-lost first husband, Roy Martin, shows up at the suburban Brady residence one evening. An impostor, the man is actually determined to steal the Bradys' familiar horse statue, a $20-million ancient Asian artifact.

Mike Brady becomes the President of the United States and names Carol as his V.P..

In a research lab, a scientist's pet chimpanzee mixes up an invisibility formula. A young woman accidentally drinks the solution and becomes invisible.