Celebrity Toons: Guess Who's Knott Coming to Dinner? (1972)
Don Knotts appeared in 2 episodes of The New Scooby-Doo Movies during the 1st season. Here, he channels fellow comedy icon Jerry Lewis as he adopts a variety of disguises, confusing Scooby and the gang, in "Guess Who's Knott Coming to Dinner?":
Don would return in "The Spooky Fog of Juneberry", paying homage to his most famous character, Barney Fife.