I saw this movie on cable back in College. In my opinion it was way ahead of its time. The movie was mostly that of a stranger in a strange land with amnesia, who comes to understand who he really is. And that he is on a rescue mission. The SciFi themes don't really emerge until very late in the film so its a very nice character study, and the actors and actresses play their parts very well. Keir Dullea did a fine job with his part and when he reveals he has recovered his memory and what he does with that knowledge leads to some very memorable moments.
Don't see this movie expecting your typical SciFI special effects extravaganza, do see it if you want to watch a serious people movie with some interesting thoughts about where humanity may eventually wind up.
In my opinion the recent Television series John Doe was a copy cat of this movie.. to a degree.. but perhaps with a little more X-Files violence and religious overtones, than this movie.
It's not a heart pounder.. just a mild adventure that leaves you a bit sad.. but hopeful in the end.. and just wondering.
It is a good movie in my opinion.. afterall I've remembered it quite well for over 20 years.
Review by john-willis-1 from the Internet Movie Database.