 The most often seen version of this movie is the version as featured on  _"Mystery Science Theater 3000 (1988)"_ (qv) in 1993. This version was  derived from a 1980s Lorimar TV print, which was then edited further by the  MST3k producers (so they could wrap the host segments of the show around it).  Because of this, several fairly important plot details in the original film  are lost (making it seem more confusing than it actually is).