John Stephenson was an American screen and voice actor, closely associated with characters in Hanna-Barbera productions, most famously Mr. Slate in The Flintstones (starring Jean Vander Pyl and Mel Blanc). He reprised his role for the many revivals and specials that were done in the decades following. He was also the narrator of the Dragnet TV series, and did several roles in The Transformers (also starring Peter Cullen, Frank Welker, Casey Kasem, and Don Messick), including Thundercracker and Kup.
Stephenson died of Alzheimer's disease in 2015, at the age of 91.
Scooby-Doo, Where Are You!
The New Scooby-Doo Movies
- Main article(s): The New Scooby-Doo Movies
The Scooby-Doo Show
- Main article(s): The Scooby-Doo Show
|101. The Swiss Alps and Tokyo, Japan|| Mildew Wolf|
|102. Acapulco and England|| Mildew Wolf|
|103. Florida and China||Mildew Wolf|
Scooby-Doo and Scrappy-Doo (first series)
- Main article(s): Scooby-Doo and Scrappy-Doo (first series)
|108. The Hairy Scare of the Devil Bear||Mr. McGee|
|109. Twenty Thousand Screams Under the Sea||Miguel Valdez|
|115. Lock the Door, It's a Minotaur!|| Lord Silvertree|
Scooby-Doo and Scrappy-Doo (second series)
- Main article(s): Scooby-Doo and Scrappy-Doo (second series)
|101(b). A Fit Night Out for Bats||Sylvester|
The New Scooby and Scrappy Doo Show
- Main article(s): The New Scooby and Scrappy Doo Show
|Scooby the Barbarian||Professor Busby/Olaf the Terrible|
|The Dinosaur Deception||Dr. LaRue|
|No Thanks, Masked Manx|| Klaus|
|Scooby of the Jungle||Mr. Rasheed|
The New Scooby-Doo Mysteries
- Main article(s): The New Scooby-Doo Mysteries
|102(a). Scooby's Peep-Hole Pandemonium||Franklin Stein|
|109. A Night Louse at the White House||President of the United States|
The 13 Ghosts of Scooby-Doo
- Main article(s): The 13 Ghosts of Scooby-Doo
|113. Horror-Scope Scoob||Boris Kreepoff|
What's New, Scooby-Doo?
- Main article(s): What's New, Scooby-Doo?
|114. The Unnatural||Bob Taylor|
|212. Uncle Scooby and Antarctica||Zelig|
- Main article(s): Scooby-Doo! Abracadabra-Doo