[Probably intentional] People on Mars move about in normal Earth gravity, but Mars has only about 38% of the gravitational pull of Earth.
Characters on Mars talk to characters on Earth with no perceptible delay in communication. Even at their closest approach, signals would take at least 3 minutes to travel the distance between Mars and Earth.
There is no breathable atmosphere on Mars and there would be no clouds in the sky.
Communication between Mars and Earth would involve a twenty minute delay between transmission and reception in both directions.
In the opening scene of "The Expeditions", the wires used to slowly lower the Mars probe are visible.
In the final sequence, the image of the Wilder family, reflected in the canal, is NOT a mirror image of the family.