Bicentennial Man
One of the handful of Robin Williams films that piled on the schmaltz so thick it seems even Robin got sick of himself, fading for a long time afterward. It wasn't a bad movie, it was just written and targeted lower that Asimov no doubt intended.
Questioning the theme of artificial intelligence and revisited later by far more competent stories in films like AI, the premise is about a robot who wants to be human. Over the course of two centuries, from the near future to an incredible looking and believable far future America, Andrew (Williams) seeks out the descendants of his adopted family after the father who bought him (Neill) believed in his dream.
With perseverance and a literal as well as figurative journey of discovery, parts of him are slowly replaced until he looks human, acts human, and can do what humans can. It's entertaining and has a good story, but it's too syrupy to appeal too much to the cerebral.