The Green Slime

This is a late sixties Japanese monster movie but it stars mostly Western actors. The rubber-suit monsters, space ships and other effects are cheesy, ridiculous and are probably the main reason a bad movie aficionado would watch this. However, the acting seems sincere and there is actually a decent attempt at story and character development. The title song is a great little blast of prog-rock psychedelica that is completely out of place with the film.