When the Martians are chasing the Earth woman, Donald Duck can be spotted among the crowd of bizarre monsters.
ABC originally broadcast this episode in black and white.
Disney didn't like having Donald Duck in the crowd of Martian monsters, but Ward Kimball said it was funny. He wanted it deleted, but Ward put it there. When it was presented Donald was still, while everyone liked it, Disney was furious.
Some of the scientific information is now outdated. For example, Dr. E. C. Slipher says that Mars' atmosphere "probably consists mostly of nitrogen and a small amount of carbon dioxide". The Martian atmosphere is now known to be 95% carbon dioxide and 2.8% nitrogen. The moons of Mars, Phobos and Deimos, are depicted as spherical but are now known to be irregular in shape.