A young(ish) caveman (Robert Vaughn) defies the clan's laws and explores the other side of the river, a place of plenty and peril, only to find out the truth about his world. The ridiculously rebranded (originally the film was entitled 'Prehistoric World') low-budget quickie from frugal auteur Roger Corman really doesn't make a lot of sense (the time course especially) but the core premise (as revealed in the 'twist ending') is more sophisticated than the film itself. Considering the cast are supposed to be 'cave-people', the script and acting is pretty good (especially the faux-teenager's father) although perennial character actor (and 'F-Troop' Indian Chief) Frank De Kova's limping 'Black-bearded One' is a weak link. The film recycles the oft-seen pseudo-antediluvian beasts from 1940's "One Million BC' as well as what maybe the least convincing tyrannosaur costume ever put on film. A number of Corman's usual thesps (including Beach Dickerson, Jonathan Haze, and Ed Nelson) wear the furs and the fearsome "God who Kills with a Touch" was designed by Paul Blaisdell (and later is repurposed as an alien mother-figure in the dire 'Night of the Blood Beast' (1958)). All in all, the film is talky and slow-moving but, like most of Corman's output, entertaining enough to pass a squandered hour.
Review of Teenage Cave Man
