The Master Key A movie serial from 1914 Details Casts Posters Title The Master Key Release Date 1914-11-16 Runtime 05 Hours 10 Minutes Genres Action Adventure Drama Production Companies Universal Film Manufacturing Company Production Countries United States of America Robert Z. Leonard... John Dore (as Bob Leonard... Ella Hall... Ruth Gallon... Harry Carter... Harry Wilkerson... Jean Hathaway... Jean Darnell... Alfred Hickman... Charles Everett... Wilbur Higby... Tom Gallon... Charles Manley... Tom Kane... Jack Holt... Donald Faversham... Jim Corey... Wah Sing... Allan Forrest... George Crane (as Alan For... Original Size (1000x1500)