Stuart Pankin
Earl Sinclair (voice) (65 eps)
Jessica Walter
Fran Sinclair (voice) (65 eps)
Jason Willinger
Robbie Sinclair (voice) (65 eps)
Sally Struthers
Charlene Sinclair (voice) (65 eps)
Kevin Clash
Baby Sinclair (voice) (65 eps)
Sam McMurray
Roy Hess (voice) (49 eps)
Florence Stanley
Grandma Ethyl Phillips (voice) (33 eps)
Sherman Hemsley
B.P. Richfield (voice) (29 eps)
Suzie Plakson
Monica Devertebrae (voice) (14 eps)
Allan Trautman
Mr. Pulman (voice) (14 eps)
Michael McKean
Mr. Myman (voice) (12 eps)
Christopher Meloni
Spike (voice) (11 eps)
Thom Sharp
Bert (voice) (9 eps)
Jessica Lundy
Mindy (voice) (8 eps)
Jason Alexander
Gus Molehill (voice) (7 eps)
Tim Curry
Pterodactyl (voice) (7 eps)
Michael Dorn
WeSaySoCorp Announcer (voice) (5 eps)
Kirk R. Thatcher
Timmy (voice) (4 eps)
Gary Owens
Narrator (voice) (4 eps)
Chuck Varesko
Television Announcer (voice) (4 eps)
Julianne Buescher
Caroline Foxworth (voice) (4 eps)
Michelan Sisti
Additional Dinosaur Performer / Cavepeople (3 eps)
Robert Picardo
Clerk (voice) (3 eps)
Brian Henson
Arthur Rizzic (voice) (3 eps)
Richard Portnow
Mel Luster (voice) (3 eps)
Paxton Whitehead
Sir David Tushingham (3 eps)
John Glover
Lucius (voice) (3 eps)
Steve Whitmire
Sonny (voice) (3 eps)
Michael Earl
Boy Contestant (voice) (2 eps)
David Wohl
Bob (voice) (2 eps)
Bruce Lanoil
Judge (voice) (2 eps)
Joe Flaherty
Chief Elder (voice) (2 eps)
Glenn Shadix
Ray (voice) (2 eps)
Joyce Kurtz
Katie (voice) (2 eps)
Steve Landesberg
Gary (voice) (1 eps)
Julia Louis-Dreyfus
Heather Worthington (voice) (1 eps)
Ken Hudson Campbell
Crazy Lou (voice) (1 eps)
Jeffrey Tambor
Hank Hibler (voice) (1 eps)
Dan Castellaneta
Zabar (voice) (1 eps)
Stephen Caffrey
Scabby (voice) (1 eps)
Harold Gould
Dinosaur Chief (voice) (1 eps)
Sally Kellerman
Pteranodon (voice) (1 eps)
Harry Shearer
Narrator (voice) (1 eps)
Perry Anzilotti
Chang Chang (1 eps)
Jeff Chayette
Ling Ling (1 eps)
Julie Maddalena
Caveman's Wife (1 eps)
Peter Bonerz
Insurance Agent (voice) (1 eps)
Steven Banks
Folk Singer (voice) (1 eps)
Paula Marshall
Cavewoman (1 eps)
Tim Doyle
General Chow (voice) (1 eps)
Mimi Kennedy
Glenda Molehill (voice) (1 eps)
Jack L. Harrell
Mr. Harold Heffer (voice) (1 eps)
David Leisure
Mr. Teddy Wolfe (voice) (1 eps)
Heather McPhaul
Caller (voice) (1 eps)
Tony Shalhoub
Jerry Valentine (voice) (1 eps)
John Vernon
Mr. Ashland (voice) (1 eps)
William Schallert
Wesayso Scientist (voice) (1 eps)
Edie McClurg
Shopper (voice) (1 eps)
Buddy Hackett
Louie (voice) (1 eps)
George Gaynes
Elder in Chief (voice) (1 eps)
G.W. Bailey
Sarge (voice) (1 eps)
Fred Travalena
Bob Hack (voice) (1 eps)
Jason Bernard
Edward R. Hero (voice) (1 eps)
Shaun Baker
Lingo (voice) (1 eps)
Michael Richards
Director (voice) (1 eps)
Richard Simmons
Richard Simmons Dinosaur (voice) (1 eps)
Kate McGregor-Stewart
Neighbor No. 3 (voice) (1 eps)
Charles Kimbrough
Dr. Ficus (voice) (1 eps)
Wendie Jo Sperber
Wendy Richfield (voice) (1 eps)
Pat Crawford Brown
Stenographer (voice) (1 eps)
Elizabeth Collins
Leeza (voice) (1 eps)
Julius Carry
Mudbelly (voice) (1 eps)
Jon Polito
Ty Warner (voice) (1 eps)
Conchata Ferrell
Shelly (voice) (1 eps)
David Warner
Spirit of the Tree (voice) (1 eps)
Susan Norfleet
Pearl Sinclair (voice) (1 eps)
Ed Asner
Evil Georgie (voice) (1 eps)
Ernie Anderson
Announcer (voice) (1 eps)
Eileen Dunn
Miss Honeywell (1 eps)