Continuity: Mantee finds a pool of water after falling through a hole. He gets in nude, but you can see him wearing tan-colored trunks during the close-ups. However, the far away shots do show him naked.

Visible crew/equipment: Paul Mantee's helmet reflects two stage lights often when he is supposedly outside.

Continuity: While avoiding the glowing meteoroid, they decide to fire their jets to push them into a higher orbit. In a couple of scenes they go up but a third one has them going back down.

Revealing: The ground beneath Mantee's feet gives way with him falling through the hole. Boy, that hole sure looked rectangular.

Factual error: Paul Mantee mentions that the orbiting spaceship has all that he needs to stay alive. If so, why did he and Adam West eject to land on Mars? They were worried about the craft's orbit decaying, but it stayed up all the time until Mantee exploded it. Someone's suggested it would decay faster if they stayed on, but orbital decay is due to atmospheric drag and not due to adding mass to the ship. Their mass is insignificant in relationship to the velocity of the ship.