Back in "One Zillion B.C.," give or take, cave-dwelling klutz Atouk (Ringo Starr) got the boot from hulking tribal leader Tonda (John Matuszak) for trying to make time with the fur-clad and fetching Lala (Barbara Bach). Falling in with similarly outcast misfits, Atouk shepherds his new clan to safety from munched-out T-rexes and other Paleolithic perils. Pre-hysterical fun with Dennis Quaid, Shelley Long, Jack Gilford, Avery Schreiber. 91 min. Widescreen (Enhanced); Soundtrack: English Dolby Digital mono.