A new girl sets her sights on Dobie when she sees how a smart girl like Zelda wants him. But will this girl be able to live with herself when she sees how brokenhearted Zelda is?

Inspired by a lab experiment in heredity, Dobie convinces Zelda that their kids could turn out dumb, like him. Then he sets her up with Chatsworth. Zelda and Chatsworth seem happy together, and Dobie's finally got Zelda off his back, so why is he so miserable?