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 McKeanMr. Myman (voice) Christopher MeloniSpike (voice) Jessica LundyMindy (voice) Jason AlexanderUFO! Host / Announcer (voice) Tim CurryJean-Claude (voice) Michael DornWeSaySoCorp Announcer (voice) Kirk R. ThatcherTimmy (voice) / Teleplay Gary OwensNarrator (voice) Chuck VareskoTV Announcer (voice) Julianne BuescherCaroline Foxworth (voice) Michelan SistiAdditional Dinosaur Performer / Cavepeople Robert PicardoTed (voice) Brian HensonArthur Rizzic (voice) / Director / Productor Richard PortnowMel Luster (voice) Paxton WhiteheadSir David Tushingham John GloverLucius (voice) Steve WhitmireMr. Mason Dixon (voice) Michael EarlBoy Contestant (voice) Bruce LanoilJudge (voice) Joe FlahertyChief Elder (voice) Joyce KurtzBrigitte (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) / Escritor 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 McCrackenDirector / Productor Brian HensonArthur Rizzic (voice) / Director / Productor Tim DoyleGeneral Chow (voice) / Escritor Michael JacobsProductor ejecutivo Brian SavegarSet Decoration John C. MulaProduction Design Kevin PfeifferArt Direction Robert E. CollinsDirector Of Photography Ray ColcordCompositor de música original Bruce BroughtonCompositor de música original Kirk R. ThatcherTimmy (voice) / Teleplay 
