It took me 44 years to finally see this again. Greg Luce at Sinister Cinema has made that possible. I reviewed this a couple of years ago and watched it again last Saturday.
A janitor accidentally blasts into space and returns in the year 2447 along with an invisible alien named Adam. The janitor finds the future world has no war or violence and he takes advantage of all the perks while Adam learns about humans.
This is a very rare but good film about how greed can destroy a person but it is put into a sci-fi perspective. I first saw this when I was about 7 or 8 on KHQ TV from Spokane Washington. I recommend you give this film a try and I think you'll like it.