Personale o equipaggiamento visibile: During the moonwalk, studio lights are seen reflected in the glass visors of the astronauts' helmets.
Revealing mistakes: During the early scenes in zero-gravity, some of the wires are visible.
Revealing mistakes: Although the characters mention that radio signals take 3 seconds to travel between the earth and the moon, earth replies arrive almost instantaneously during conversations with the men on the moon.
Revealing mistakes: When the astronauts emerge from the hatch during their spacewalk to repair the antenna, the shadow of one of the film crew can be seen on the open hatch door, helping push the cast members out onto the surface of the "ship".