Visible crew/equipment: Throughout the movie, if you watch closely you can see the zippers on the backs of the Eye Creatures' costumes pretty easily.
Visible crew/equipment: In the final scene where Frankenstein is fighting the Spacemonster on the spaceship, there are upshots of the monster attacking to make him look larger, but looking right behind his head you can see a ceiling mounted fluorescent light and electrical conduit; neither of which would have been on a spaceship.