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.

Voice roles

TV series

Scooby-Doo, Where Are You!

Episode Role
101. What a Night for a Knight Black Knight
106. What the Hex Going On? Stuart Wetherby/
Ghost of Elias Kingston
109. The Backstage Rage Viking puppet
Pirate puppet
110. Bedlam in the Big Top Samson the Strongman
111. A Gaggle of Galloping Ghosts Big Bob Oakley/
Frankenstein's Monster/
Gypsy (as Big Bob Oakley)
112. Scooby Doo and a Mummy, Too Mummy of Ankha
113. Which Witch is Which? Sheriff
114. Go Away Ghost Ship Butler
Coast guard officer
201. Nowhere to Hyde Dr. Jekyll/
Ghost of Mr. Hyde
203. Scooby's Night with a Frozen Fright Professor Wayne/
204. Jeepers, It's the Creeper The Creeper
206. A Tiki Scare is No Fair John Simms/
Witch Doctor
Mano Tiki Tia

The New Scooby-Doo Movies

Main article(s): The New Scooby-Doo Movies
Episode Role
103. Wednesday is Missing Cousin Itt
104. The Frickert Fracas Simon Shakey
Vernon Crow
106. A Good Medium is Rare Mysto
107. Sandy Duncan's Jekyll and Hyde Mr. Thayer
Zalia Z. Fairchild
Mr. Hyde
108. The Secret of Shark Island Milo Meekly
110. The Ghost of Bigfoot Hans Edelweiss
111. The Ghost of the Red Baron Mr. Siegfried
113. The Haunted Horseman of Hagglethorn Hall Creech
116. The Lochness Mess Winslow
201. The Mystery of Haunted Island Scorpions owner
202. The Haunted Showboat Johnny Briggs
204. The Spirit Spooked Sports Show Spirit of Fireball McPhan
Jay Teller
205. The Exterminator Lorne Chumley
207. The Haunted Candy Factory Mr. Crink
Sterling Smith
Green Glob 2
Detective Storm

The Scooby-Doo Show

Main article(s): The Scooby-Doo Show
Episode Role
101. High Rise Hair Raiser Mr. Doherty
Specter of Ebenezer Crabbe
Mr. Spec
102. The Fiesta Host is an Aztec Ghost Juan Martinez
Aztec Statue Monster
104. Watt a Shocking Ghost 10,000 Volt Ghost
Mayor Dudley
105. The Headless Horseman of Halloween Elwood Crane
Headless Horseman
106. Scared a Lot in Camelot Zarko
Ghost of Merlin
107. The Harum-Scarum Sanitarium Dr. Tooksbury
108. The No-Face Zombie Chase Case Lieutenant
Mr. Dilly
109. Mamba Wamba and the Voodoo Hoodoo Roger
Mamba Wamba
110. A Frightened Hound Meets Demons Underground Sam Crenshaw
Albert Tross
111. A Bum Steer for Scooby Matt Blake
112. There's a Demon Shark in the Foggy Dark Mr. Wells
Demon Shark
Customs agent
113. Scooby-Doo, Where's the Crew? Professor Poisson
Mr. McGil
Ghost of Captain Pescado
114. The Ghost That Sacked the Quarterback Buck Bender
Mr. Prentice
Mr. Ellsworth
Rambling Ghost
115. The Ghost of the Bad Humor Man Avery Queen
Sammy the Shrimp
Vanilla Technicolor Phantom
Chocolate Technicolor Phantom
Strawberry Technicolor Phantom
116. The Spirits of '76 Mr. Clive
Mr. Grumper
Ghost of Benedict Arnold
Ghost of William Demont
Ghost of Major Andre
Government agent
201. The Curse of the Viking Lake Uncle John
Mr. Hansen
Viking ghosts
Sheriff Swenson
202. Vampire Bats and Scaredy Cats Leon Vanaugh
203. Hang in There, Scooby-Doo Mr. Bohannon
Hang-glider contest judge 1
204. The Chiller Diller Movie Thriller Rod Kennedy
Phantom of Milo Booth
Phantom of Dixie/
Actor as Phantom of Dixie
205. The Spooky Case of the Grand Prix Race Race announcer
207. Creepy Cruise Professor Von Klamp
Futuristic monster
208. The Creepy Heap from the Deep The Creepy Heap from the Deep
301. Watch Out! The Willawaw! Red Herron
302. A Creepy Tangle in the Bermuda Triangle Dr. Grimsley
Skeleton Men
303. A Scary Night with a Snow Beast Fright Professor Kreuger
Chief Manook
305. The Tar Monster Professor Brixton
308. Jeepers, It's the Jaguaro! Jaguaro
313. A Menace in Venice Professor Salari
314. Don't Go Near the Fortress of Fear Captain Eddy
Ghost of Juan Carlos


Episode Role
101. The Swiss Alps and Tokyo, Japan Mildew Wolf
Doggie Daddy
102. Acapulco and England Mildew Wolf
Doggie Daddy
103. Florida and China Mildew Wolf

Scooby-Doo and Scrappy-Doo (first series)

Main article(s): Scooby-Doo and Scrappy-Doo (first series)
Episode Role
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
Nick Papas/Minotaur

Scooby-Doo and Scrappy-Doo (second series)

Main article(s): Scooby-Doo and Scrappy-Doo (second series)
Episode Role
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
Episode Role
Scooby the Barbarian Professor Busby/Olaf the Terrible
The Dinosaur Deception Dr. LaRue
No Thanks, Masked Manx Klaus
Milo Damp/
Masked Manx
Scooby of the Jungle Mr. Rasheed

The New Scooby-Doo Mysteries

Main article(s): The New Scooby-Doo Mysteries
Episode Role
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
Episode Role
113. Horror-Scope Scoob Boris Kreepoff

What's New, Scooby-Doo?

Main article(s): What's New, Scooby-Doo?
Episode Role
114. The Unnatural Bob Taylor
212. Uncle Scooby and Antarctica Zelig

Direct-to-video films

Scooby-Doo! Abracadabra-Doo

Main article(s): Scooby-Doo! Abracadabra-Doo
The Sheriff