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 McKeanGuy in the Lab Coat (voice) Christopher MeloniSpike (voice) Jessica LundyMindy (voice) Jason AlexanderGeneral H. Norman Conquest (voice) Tim CurryChief Elder (voice) Michael DornWeSaySoCorp Announcer (voice) Kirk R. ThatcherTimmy (voice) / Schrijver Gary OwensNarrator (voice) Chuck VareskoTV Announcer (voice) Julianne BuescherCaroline Foxworth (voice) Michelan SistiAdditional Dinosaur Performer / Cavepeople Robert PicardoTed (voice) Brian HensonArthur Rizzic (voice) / Regisseur / Producer Richard PortnowMel Luster (voice) Paxton WhiteheadSir David Tushingham John GloverLucius (voice) Steve WhitmireSonny (voice) Michael EarlBoy Contestant (voice) Bruce LanoilFrancois Jean-Marie Poupon (voice) Joe FlahertyChief Elder (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) / Teleplay 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 Kirk R. ThatcherTimmy (voice) / Schrijver Lawrence H. LevySchrijver Michael JacobsExecutive Producer Brian SavegarSet Decoration John C. MulaProduction Design Kevin PfeifferArt Direction Robert E. CollinsDirector Of Photography Ray ColcordOriginal Music Composer Bruce BroughtonOriginal Music Composer Tim DoyleGeneral Chow (voice) / Teleplay 
