Two lovers stationed on a remote moon base of Saturn are intruded upon by a murderous man and his malevolent 8-ft robot.
Its production issues, changing of directors (one of which was the late great John Barry) and budget cuts aside for a film that was made in 1980 it feels like late 60s/70s. That said, the sets that take a leaf from Alien (1979) are partially effective and the blue ominous lighting works but is sadly used sparingly.
The late Farrah Fawcett is still a major draw and although there's a cringe worthy age gap between leads it is fitting to the narratives themes. Acting legend Kirk Douglas is a little inconsistent and not on form possibly due to the script or production woes. Harvey Keitel has been unconventionally re-dubbed which is a shame, but he still is effective as the homicidal sociopath, off beat, boorish Earth Captain Benson. Although choppy, there's some great setups with the interestingly designed Hector robot and Elmer Bernstein's score if fantastic.
It's not purposely ambiguous, but it leaves many questions and loose ends. It's by no means the worst science-fiction movie, John Barry's story offers some great ideas and has clearly influenced subsequent scifi's notably the Matrix (1999) plug-in.
It's flawed and inconsistent but still worth viewing for the concept alone.