Review of Hauser's Memory

I saw this movie a couple of times many years ago, and still remember it as being very different. I would love to see it again. I noticed that it is not listed on David McCallum's filmography in Wikipedia which is surprising... I found David McCallum with dark hair rather unsettling.The story is about a scientist who has his memory transformed when he uses an experimental drug and the consequences of this. Considering that the cast also included Lesley Nielsen and Lilli Palmer, I think it is strange that it has sunk without trace. There are quite a few excellent movies from the 60s and 70s which have been forgotten and when they feature actors and actresses who have gone on to be significant, you would think that they would be worth reviving. I know that the old Man from UNCLE movies have been issued on DVD quite recently so maybe there is hope yet. If you get a chance to see Hauser's Memory and you are interested in the development of serious ideas in science fiction, I recommend you watch it.