A hard-to-come-by film, which is a shame as this is a real gem. A group of space travellers are accidentally stranded on a distant alien planet which turns out to be inhabited by prehistoric monsters. This is real edge-of-seat suspence from beginning to end, and you really feel for the characters. There is plenty of appropriately chilling scenery (and I couldn’t see any houses or roads), a superbly eerie soundtrack and some dramatic, impressive stop-motion dinosaurs including one of the scariest Tyrannosaurs ever to dominate a movie screen (it even kills the Beast from 20,000 Fathoms at one point, the Harryhausen monster’s cameo a nice touch). An under-rated classic, up there with the best dinosaur films.