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(en)
1912
2h30m
Action
Thriller
Overview: The forerunner of all serials, What Happened to Mary was a series of twelve monthly one reel episodes, each a complete entity in itself, revolving its immediate dramatic and melodramatic problems within the framework of a single episode and designed more for story and suspense situations than action.
Status: Released
Release date: July 25, 1912
Countries of origin: United States of America,