The Settlers

The scene in which the two priests meet with Colonel Wilder was filmed at one of the ancient temples on Malta.

The couple at the remote diner look at the Earth through a telescope at night (stars in the background). This is impossible since Earth's orbit is inside the orbit of Mars. But in fact it is exactly the same as viewing Venus and Mercury from Earth, which is perfectly possible at night. When the sun has just set, one can see objects that are in the sun's vicinity. Just like Venus is visible from Earth, both Earth and its moon are visible from Mars as evening or morning stars.

Followed by The Martian Chronicles: The Martians (1980)