The Kids Were Bored?
I just bought it on DVD and I remember it so well from watching it 30+ years ago, I don't expect any surprises.
I'm not thru part one yet, but one bit I have always remembered was Rock Hudson's kids sitting there in the final part, and they were bored.
BORED! On MARS! My brother and I couldnt get over that. This was when Rock took them on the river at the end.
For some reason, that just never sat well with me.
Another one was the 'jealous husband' at the beginning of the first part, who kills the first two astronauts.
He put on that helmet with its one-eye cyclops look and I laughed. I was a very cynical teen-ager, but it didnt look foreign or alien, it looked ridiculous.
I've always hated alien guns from Star Trek to Doctor Who, all the swords and shooting buttons, so that didn't matter, but that helmet just made me laugh.