While this one slipped into obscurity (and the fact Warner Brothers made few copies means this is one hard to find even as an UK import, and it’s oddly pricey, same as for 50’s stinker From Hell It Came), there’s an interesting production history to tell with The Valley Of Gwangi, so gather round the fire, grill some ‘saurus and listen close.

The film was originally conceived by special effect legend Willis O’ Brien (yes “the King Kong guy”), and was basically a mash-up of Arthur Conan Doyle’s The Lost World, with the added “Kong flavor” of having the creature captured, brought into civilization only to escape, and was known as “ Valley Of The Mists”, where cowboys discovered and captured an Allosaurus – dubbed “Gwangi” – in the Grand Canyon, brought it to a Wild West show, and having it fight with lions (so much for the Wild West theme), until it breaks free, runs amok and is driven off a cliff by a truck.