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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.
as Mary
as Lt. Straker
as Richard Craig - Mary's Uncle
as Henry - Craig's Son
as Daisy
as Mr. Foster - the Lawyer
as Billy Pearl
as A Spy
as Rev. Cooper