Outland (1981)

Outland is 2001 meets High Noon, starring Sean Connery as the lone marshal. Largely dark and murky because it's set on a Jovian moon's space station, Outland has Alien-like accoutrements in its space helmets and landing pads and is truly a space western with showdowns aplenty. Frances Sternhagen is great as the wily doc who watches his back. 3.5 stars.