Don Knotts did not play Luther Heggs in The Ghost and Mr. Chicken.
 In 1972, Knotts voiced an animated version of himself in two episodes of The New Scooby Doo Movies: "The Spooky Fog of Juneberry", in which he played a lawman resembling Barney Fife, and "Guess Who's Knott Coming to Dinner"
 It was produced by Martin Rips and Joseph Staretski, who had previously worked on Three's Company

