Stuart Pankin (45)

Earl Sinclair (voice)

Jessica Walter (50)

Fran Sinclair (voice)

Jason Willinger

Robbie Sinclair (voice)

Sally Struthers (43)

Charlene Sinclair (voice)

Kevin Clash (30)

Baby Sinclair (voice)

Steve Landesberg (54)

Gary (voice)

Julia Louis-Dreyfus (30)

Heather Worthington (voice)

Ken Hudson Campbell (28)

Crazy Lou (voice)

Jeffrey Tambor (46)

Hank Hibler (voice)

Dan Castellaneta (33)

Zabar (voice)

Michelan Sisti (41)

Additional Dinosaur Performer / Cavepeople

Stephen Caffrey (31)

Scabby (voice)

Harold Gould (67)

Dinosaur Chief (voice)

Robert Picardo (37)

Muse (voice) / Clerk (voice) / Ted (voice)

Sally Kellerman (53)

Pteranodon (voice)

Brian Henson (27)

Arthur Rizzic (voice) / Aubrey Molehill (voice)

Harry Shearer (47)

Narrator (voice)

Perry Anzilotti (31)

Chang Chang

Jeff Chayette

Ling Ling

Julie Maddalena

Caveman's Wife

Peter Bonerz (52)

Insurance Agent (voice)

Steven Banks (36)

Folk Singer (voice)

Michael Earl (31)

Boy Contestant (voice) / Refrigerator Monster (voice)

Paula Marshall (26)

Cavewoman

Tim Doyle (31)

General Chow (voice)

David Wohl (37)

Bob (voice)

Mimi Kennedy (42)

Glenda Molehill (voice)

Michael Dorn (38)

WeSaySoCorp Announcer (voice) / Television Announcer (voice) / Elder in Chief (voice) / Solomon The Great (voice)

Jack L. Harrell

Mr. Harold Heffer (voice)

David Leisure (40)

Mr. Teddy Wolfe (voice)