Quark was a 1977 science fiction sitcom starring Richard Benjamin as Commander Adam Quark, who captains an interstellar garbage scow in the year 2226. Real-life twins Cyb and Patricia Barnstable played Betty I and Betty II, (a.k.a. “The Bettys”) who were the navigator and pilot. The joke was that one of them is a clone of the other, but each claims the other one is the clone.
Michael Douglas and Karl Malden in The Streets of San Francisco (1972)
Working girls Honey comes to Los Angeles to seek her new lifestyle, but is flat…
Candy Davis, Mollie Sugden, and Frank Thornton in Are You Being Served? (1972) This quintessentially…