1964/5: The Time Travelers 1964

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https://en.wikipedia.org/wiki/The_Time_Travelers_(1964_film) 

https://www.moriareviews.com/sciencefiction/time-travelers-1964.htm

http://www.1000misspenthours.com/reviews/reviewsn-z/timetravelers1964.htm

https://badmoviesforbadpeople.wordpress.com/2016/03/12/the-time-travelers-1964-review/