Space: 1999 - Full Series Information, Trailer & IMDb Reviews
Watch Space: 1999 Season 1 Episode 15 online — it may be available on legal streaming platforms such as YouTube, Netflix, Prime Video, Hulu, Disney+, and others.
Space: 1999: The residents of Alpha take a trip through time as the moon passes through a time warp and the Alphans meet themselves as caveman from the Stone Age of 40,000 years ago.