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.
Horace G. Plympton
Writer
Charles Brabin
Director
Mary Fuller
Mary
Marc McDermott
Lt. Straker
Charles Ogle
Richard Craig - Mary's Uncle
Barry O'Moore
Henry - Craig's Son
Bliss Milford
Daisy
Bigelow Cooper
Mr. Foster - the Lawyer
William Wadsworth
Billy Pearl
Miriam Nesbitt
A Spy
Harold M. Shaw
Rev. Cooper
The Truth About Emanuel59%
Race with the Devil64%
Airborne60%
Maniac61%
The Lady Vanishes64%
No Name on the Bullet66%
Black Widow61%
The MacKintosh Man61%
The Glass Key66%
Space/Time58%
The Deadly Affair62%
Foreign Correspondent70%
Nightfall69%
The Naked City72%
See Spot Run60%
Henry Danger: The Movie76%
Seeds of Yesterday64%
The Mechanic66%
Battleground67%
Ballistic61%
