Stuart PankinEarl Sinclair (voice) Jessica WalterFran Sinclair (voice) Jason WillingerRobbie Sinclair (voice) Sally StruthersCharlene Sinclair (voice) Kevin ClashBaby Sinclair (voice) Sam McMurrayRoy Hess (voice) Florence StanleyGrandma Ethyl Phillips (voice) Sherman HemsleyB.P. Richfield (voice) Suzie PlaksonMonica Devertebrae (voice) Allan TrautmanMr. Pulman (voice) Michael McKeanHank (voice) Christopher MeloniSpike (voice) Jessica LundyMindy (voice) Jason AlexanderThe Job Wizard (voice) Tim CurryPterodactyl (voice) Michael DornWeSaySoCorp Announcer (voice) Kirk R. ThatcherTimmy (voice) / Story Gary OwensNarrator (voice) Chuck VareskoUSO Stage Manager (voice) Julianne BuescherCaroline Foxworth (voice) Michelan SistiAdditional Dinosaur Performer / Cavepeople Robert PicardoClerk (voice) Brian HensonArthur Rizzic (voice) / Regisseur / Producer Richard PortnowMel Luster (voice) Paxton WhiteheadSir David Tushingham John GloverBabysitter (voice) Steve WhitmireMr. Mason Dixon (voice) Michael EarlRefrigerator Monster (voice) Bruce LanoilJudge (voice) Joe FlahertyElder (voice) Glenn ShadixMonster (voice) Steve LandesbergGary (voice) Julia Louis-DreyfusHeather Worthington (voice) Ken Hudson CampbellCrazy Lou (voice) Jeffrey TamborHank Hibler (voice) Dan CastellanetaZabar (voice) Stephen CaffreyScabby (voice) Harold GouldDinosaur Chief (voice) Sally KellermanPteranodon (voice) Harry ShearerNarrator (voice) Perry AnzilottiChang Chang Julie MaddalenaCaveman's Wife Peter BonerzInsurance Agent (voice) Steven BanksFolk Singer (voice) Tim DoyleGeneral Chow (voice) / Schrijver Mimi KennedyGlenda Molehill (voice) Jack L. HarrellMr. Harold Heffer (voice) David LeisureMr. Teddy Wolfe (voice) Heather McPhaulCaller (voice) Tony ShalhoubJerry Valentine (voice) John VernonMr. Ashland (voice) William SchallertWesayso Scientist (voice) Edie McClurgShopper (voice) Buddy HackettLouie (voice) George GaynesElder in Chief (voice) Fred TravalenaBob Hack (voice) Jason BernardEdward R. Hero (voice) Michael RichardsDirector (voice) Richard SimmonsRichard Simmons Dinosaur (voice) Kate McGregor-StewartNeighbor No. 3 (voice) Charles KimbroughDr. Ficus (voice) Wendie Jo SperberWendy Richfield (voice) Pat Crawford BrownStenographer (voice) Elizabeth CollinsLeeza (voice) Julius CarryMudbelly (voice) Jon PolitoTy Warner (voice) Conchata FerrellShelly (voice) David WarnerSpirit of the Tree (voice) Susan NorfleetPearl Sinclair (voice) Ed AsnerEvil Georgie (voice) Ernie AndersonAnnouncer (voice) (uncredited) Eileen DunnMiss Honeywell Jeff McCrackenRegisseur / Producer Brian HensonArthur Rizzic (voice) / Regisseur / Producer Tim DoyleGeneral Chow (voice) / Schrijver Lawrence H. LevySchrijver Michael JacobsExecutive Producer John C. MulaProduction Design Brian SavegarSet Decoration Kevin PfeifferArt Direction Robert E. CollinsDirector Of Photography Ray ColcordOriginal Music Composer Bruce BroughtonOriginal Music Composer Kirk R. ThatcherTimmy (voice) / Story 
