It's another Planet of the Apes/The Time Machine redux as a stuffy scientist (Peter Cushing) and a cowboy-inspired rich guy (Doug McClure) set off in an oversized drill/spaceship en route for the center of the earth. Of course, all kinds of creatures live there, namely large dodo-dinosaur hybrids, their monkey-pig underlings, and a humanoid race of slaves under their thumb. They even speak the Queen's English. While the fire effects are cool, the creatures are unilaterally awful. For 1976, an effects-driven film needs an awful lot more than plastic masks and stop-motion winking. Oh, and the script is lifeless, to boot.
Time hasn't forgotten them that much... they speak English, wear clothes, and use metal weapons. In this sequel to The Land That Time Forgot, our heroes brave a remote wasteland in search of a fallen comrade, only to discover that dinosaurs are alive and well and living among some primitive humans. (Dana Gillespie's cave girl is probably the hottest woman ever to exist without the aid of shampoo or toothpaste.) Surprisingly well acted and with slightly better-than-awful special effects, these People are worth at least one kitschy memory.
Screaming the first time might be an issue if you can sit through this collaboration among Price, Lee, and Cushing, none of which do much with their roles. While some of the film's boundary-pushing (for 1969) moments of gore are spine-tingling (namely when a serial killer removes his own hand to escape a pair of cuffs). But this odd conflagration of mass murderer, scientific experimentation, and strange neo-Nazi group on the prowl stories just doesn't work. At all.