Sanford and Son S03E14 - Mama's Baby, Papa's Maybe

Grady has a a piece of juicy gossip and is just dying to tell everyone. It seems Grip, an old friend, dated Fred's late-wife, Elizabeth, prior to her getting married to Fred. Elizabeth and Grip had been intimate and Lamont is the result. Fred is convinced Grip is nothing but a "jive turkey" and Esther may have the answer to this paternity question.