Saturn 3 (1980)

Set in a future where Earth is teeming with people and sustenance must be sourced from far-off outposts, the Saturn 3 station serves as a crucial hub. Major Adam and scientist Alex, entwined in both professional and romantic bonds, dedicate three years to advancing hydroponics within the isolated facility alongside their faithful companion, Sally the dog. The arrival of Captain Benson, accompanied by the enigmatic Hector, heralds a sinister turn of events as Benson's violent inclinations and mental instability are ominously transferred to his unsuspecting associate. Now, Major Adam and Alex find themselves ensnared in the confines of the station with a perilous robotic entity embodying the malevolent essence of a madman.