Capitalising on the success of the first two Space:1999 movies (episodes edited together as cinema features in the wake of Star Wars) ITC created what would ultimately become thirteen full-length movies for cable and home video under the banner Super Space Theater. Four of these were made from episodes of Space:1999, though they included new music in places and (for Alien Attack) additional scenes.

Each of these four movies has been rebuilt from the High-Definition restorations created for the series episodes – they are presented here in their original 4:3 full screen aspect ratio alongside new 16:9 widescreen special editions, with both Alien Attack and Destination Moonbase-Alpha featuring enhanced special effects. All four special editions have been re-edited, restoring scenes and adding material not in the original presentation.

Also included in this set is a rebuild of the Italian theatrical movie Spazio:1999 – debuting several months before TV transmissions began and featuring an idiosyncratic score from the legendary Ennio Morricone, it was the first time Space:1999 was seen anywhere in the world.