Main •
Don Messick –
Scooby-Doo •
Casey Kasem –
Norville "Shaggy" Rogers •
Frank Welker –
Fred Jones •
Heather North –
Daphne Blake •
Nicole Jaffe –
Velma Dinkley Special guest stars •
Don Adams – Himself (in "The Exterminator") •
Eddie "Rochester" Anderson -
Bobby Joe Mason (in "The Ghostly Creep from the Deep", "The Loch Ness Mess", and "The Mystery of Haunted Island") •
John Astin –
Gomez Addams (in "Wednesday Is Missing") •
Joe Besser – Babu (in "Mystery in Persia") •
Daws Butler –
Larry and
Curly Joe (in "Ghastly Ghost Town" and "The Ghost of the Red Baron") •
Ted Cassidy –
Lurch (in "Wednesday Is Missing") •
Sonny & Cher – Themselves (in "The Secret of Shark Island") •
Tim Conway – Himself (in "The Spirit Spooked Sports Show") •
Jackie Coogan –
Uncle Fester (in "Wednesday Is Missing") •
Scatman Crothers -
Meadowlark Lemon (in "The Ghostly Creep from the Deep", "The Loch Ness Mess", and "The Mystery of Haunted Island") •
Phyllis Diller – Herself (in "A Good Medium Is Rare") •
Robert DoQui -
Pablo Robertson (in "The Ghostly Creep from the Deep", "The Loch Ness Mess", and "The Mystery of Haunted Island") •
Sandy Duncan – Herself (in "Sandy Duncan's Jekyll and Hyde") •
Dick Van Dyke – Himself (in "The Haunted Carnival") •
Cass Elliot – Herself (in "The Haunted Candy Factory") • Richard Elkins - J.C. "Gip" Gipson (in "The Ghostly Creep from the Deep", "The Loch Ness Mess", and "The Mystery of Haunted Island") •
Jodie Foster –
Pugsley Addams (in "Wednesday Is Missing") •
Stu Gilliam -
Curly Neal (in "The Ghostly Creep from the Deep", "The Loch Ness Mess", and "The Mystery of Haunted Island") •
Larry Harmon –
Stan Laurel (in "The Ghost of Bigfoot"), Ghost of
Bigfoot (in "The Ghost of Bigfoot") •
Pat Harrington –
Moe (in "Ghastly Ghost Town" and "The Ghost of the Red Baron") • Cindy Henderson –
Wednesday Addams (in "Wednesday Is Missing") •
Don Knotts – Himself (in "Guess Who's Knott Coming to Dinner?" and "The Spooky Fog of Juneberry") •
Carolyn Jones –
Morticia Addams (in "Wednesday Is Missing") •
Davy Jones – Himself (in "The Haunted Horseman of Hagglethorn Hall") •
Jim MacGeorge -
Oliver Hardy (in "The Ghost of Bigfoot") •
Julie McWhirter -
Jeannie •
Jerry Reed – Himself (in "The Phantom of the Country Music Hall") •
Olan Soule –
Batman (in "The Dynamic Scooby-Doo Affair" and "The Caped Crusader Caper") •
Janet Waldo –
Granny Frump (in "Wednesday Is Missing") and
Josie (in "The Haunted Showboat") • Johnny Williams -
Geese Ausby (in "The Ghostly Creep from the Deep", "The Loch Ness Mess", and "The Mystery of Haunted Island") •
Jonathan Winters – Himself (in "The Frickert Fracas"), Maude Frickert (in "The Frickert Fracas") ==Staff==