This television episode refers to:
January 27, 1976 - May 10, 1983
After coming back from killing God at the big bang, the first thing Chode and Gus see when the elevator door opens is Six and T'Nuk Layor (who are now gay lovers) singing the Laverne and Shirley theme song, "Schlemiel! Schlimazel! Hasenpfeffer Incorporated!"