Visible crew/equipment: Dr. Marvin decides to try out his new improved magnetic interference unit on a real alien spaceship that shows up outside the Belmont lab. As the truck with the device on it pulls up you can see the reflection of the crew in its door. (00:51:50)
Visible crew/equipment: The first time we see Fogg the shadow of the camera operator (film director?) and camera sliding smoothly along tracks is perfectly visible.