Believed shed from the BBC's early 1970s purge, damaging movie prints of all 6 episodes ended up recovered from BBC Enterprises in the late seventies. These prints look to get stemmed from a 1973 sale to Algeria, and Consequently the final episode was amended so which the "Future Episode" caption http://theoaseries70257.win-blog.com/2510381/the-basic-principles-of-hostile-planet-season-1