From Season 2, Episode 10.
Original Airdate: November 17, 1972.
When Lamont brings home an antique gun, Fred pulls the trigger and is surprised to learn the gun was loaded. The bullet careens through the neighbor’s window and Fred is concerned about his safety.

In a bit of trivia, Redd Foxx’s real last name was Sanford and although his first name was John, he had a brother named Fred.