Try watching this one on 2CI,LSD,2CB.I still Do.Just amazing!. At the end is like the Space-Man is into a K-hole!.
I saw it in theater in '69. It was unique - maybe ahead of its time in space movies. I wasn't into drugs then, saw it str8 and it was still rather spaced out. The ending when Bowman gets progressively older at every turn. I think that is happening to me now. Really, time speeds up when you pass 60.