Corrected entry: 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.Larry Koehn
Corrected entry: The aliens have interstellar travel capacity, use remote controlled mining equipment, and are in general very technically advanced. Why do they use inefficient (if expendable) humanoid slaves for mining?
Corrected entry: When Mars' two moons are shown in the scene after he eats the cooked sausages, they are both shown as spheres like our own moon, a "best guess" by the background painter. We now know from NASA photos that they are actually both jagged and irregular shaped moons.
Corrected entry: Mantee takes great strides in covering his tracks on Mars when he realizes he may not be alone because he find a buried human with shackles on the arms of the skeleton. He later sees a spaceship near the horizon landing, and he thinks it is from Earth to save him. The crafts lands in a zig-zag pattern; yet, he landed his craft straight down. The human skeleton near his cave plus the strange landing of the craft should have brought his guard up, but instead, he gets excited and heads over to the landed craft the next day.Larry Koehn
Corrected entry: Because the escape slave "Friday" has shackles on his arms, the aliens can home in on him and create great pain through the bracelets. The second half of the film, the aliens are constantly after him. Why are the aliens worried about an escaped slave on a hostile planet who won't live very long after they leave?Larry Koehn