Directed by
| Edward A. Kull | ||
Writing Credits (in alphabetical order)
| Jacques Futrelle | ... | (story "The Diamond Master") |
| George W. Pyper | ... | (adaptation) |
| Robert F. Roden | ... | (adaptation) |
Cast (in credits order)
| Eileen Sedgwick | ... | Doris Harvey | |
| George Chesebro | ... | Bruce Weston | |
 |
Frank Clark | ... | Julius Zeidt (as Frank Clarke) |
|
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Burton S. Wilson | ... | John Harvey (as Burton Wilson) |
|
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Alfred Fisher | ... | Professor Harvey |
| Josephine Scott | ... | Aline Earl | |
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Lew Short | ... | Reitman (as Lou Short) |
| Albert J. Smith | ... | Professor Ramsey (as Al Smith) | |
