Let's discuss how the surviving humans will repopulate Mars
okay...
Christopher Connely, who is hooked up with a robotic woman, will have to wait till Rock Hudson's daughter (who grew up a hottie) is of age and he will have to be her mate to have babies (we don't want McGavin having a go at her, that'd be gross; plus he's married).
Rock Hudson's son, when he's of age, is going to have to make Bernedette Peters come off her high horse and knock her up.
Rock's character has his wife and his wife is young and can have more babies; and I'm sure Darrin McGavin and Joyce Van Patten are too old.
So that's about it then I guess.
Boy what a planet that's gonna be.