This screening is part of the Cinematic Jukebox season at the Prince Charles Cinema. You can find the full details here.
Chicago Reader review:
Probably John Boorman's most underrated film—an impossibly ambitious and pretentious but also highly inventive, provocative, and visually striking SF adventure with metaphysical trimmings (1974). Set in a postapocalyptic society in 2293, it stars Sean Connery as a warrior and noble savage with dawning awareness; interestingly enough, the plot in many ways resembles that of Boorman's best film, Point Blank.
Here (and above) is the trailer.