Roy Scheider plays the astronaut/skipper of a U.S.-Soviet space mission, sent to find out what happened to the missing Discovery flight that carried Keir Dullea into the beyond in the original 2001. —allmovie guide
Once you get over the sacrilege of not only making a sequel to 2001, but making it direct, prosaic, and sentimental, this is an absolutely not-bad sci-fi film that's had the decency to be largely forgotten, so the original can still stand alone.
Abstract ideas: ruined. Interpretation: ruined. Tone: ruined. What's left: another boring, ultra-linear SFX exhibition. There's a reason Kubrick went out of his way to DESTROY ALL THE MATERIALS from 2001.