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(on Wikipedia)
https://www.imdb.com/title/tt0074559/
After a disaster, a pleasure theme park re-opens with a new population of robots.
Although this one has held up well, it does show its age. It's still spectacularly well-made, and especially well-written.
See also:
- Invasion of the Body Snatchers - (1956 movie) has a similar theme.