The Most Unbelievable Old-School ‘Scooby-Doo’ Guest Stars

For a roving gang of mystery-solving, pot-addled hippies living out of a windowless van with aging demon/kitty cat imposters known as KISS.
This is by no means a new trend, even back in the show’s early days, when bell-bottoms, pet rocks and Scooby-Doo featured a number of random appearances from surprising celebrities. Such as…
Sonny & Cher
Who better to solve a mystery involving some kind of Cher, considering that she reed the Scooby-verse to once again battle mutant shark-men in 2021.
Don Knotts
The great Knotts ed the Scooby gang for two adventures, playing a detective who looks exactly like Don Knotts in “Guess Who’s Knott Coming to Dinner?” and a barely legally-dissimilar version of his Andy Griffith’s familiarity with the legal system.
Mama Cass
Cass Elliott, the legendary vocalist from The Mamas & The Papas, showed up in “The Haunted Candy Factory,” playing a fictional version of herself who, for some reason, has bought a confectionery production plant overrun by villainous Green Globs and is, even more confusingly, seemingly the lone employee.
The Three Stooges
were resurrected as crime-fighting robots.
Laurel and Hardy
The Stooges weren’t the only iconic comedy team to confuse a generation of young cartoon viewers; Laurel and Hardy ed the Scooby gang in the “Ghost of Bigfoot.”
Speaking of g–g–g–ghosts, this show came out seven years after the death of Stan Laurel and fifteen years after Oliver Hardy ed away. Spooky.
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