The Many Loves of Dobie Gillis

The Right Triangle (1x4)

Air date: Oct 20, 1959

Dobie's rarely seen older brother Davey [played by Darryl Hickman] convinces him to invent an affair with a married woman to impress a new girl in school,but then everyone starts believing that Dobie really is having an affair with his math teacher [played by Jean Byron].