Continuity: When Klatu goes to see the professor, there are several white notes tacked around the chalk board. In later shots some of the notes are gone.

Revealing: When the spaceship is going to take-off, every scientists are trying to escape, but there's a man wearing a light colored suit and hat who seems more interested in pushing the chairs everywhere than escaping. He even pushes a chair in another row. The director obviously told the actors to push some chairs to create more excitement in the scene, but he seems to take that too seriously.

Continuity: In the newspaper headlined 'Step up Hunt for Spaceman' the photo on the right shows Klatu and Gort on the hull of the ship. This shot is a still from the end of the film.

Continuity: When the power goes out there is a scene where it shows all the cars not being able to work, although in the background there is a movie marquee with the lights on.

Visible crew/equipment: In a few scenes the stitches holding together the front and back halves of Gort's "metal" body can be seen.