5. Knotts Ruled Hollywood Squares
At one time, Hollywood Squares, a game show featuring a stack of nine squares with celebrities in each square, was quite popular. The celebs would make their best guess at answering trivia questions. Contestants on the show would have to decide if the celeb was right or not. Due to his comedic style, Knotts made regular appearances on the show while it was still on the air. The show went off the air in 2004, probably because Knotts wasn’t on it anymore.