| Person | Type | Job | Role(s) |
|---|---|---|---|
 Adolph Bolm | Crew | Crew | Choreographer |
 Alexandre Dumas | Crew | Writing | Novel |
 David Sharpe | Crew | Crew | Stunts |
 Dimitri Tiomkin | Crew | Sound | Original Music Composer |
Don L. Cash | Crew | Costume & Make-Up | Makeup Artist |
Edward G. Boyle | Crew | Art | Set Decoration |
Edward Small | Crew | Production | Producer |
George Bruce | Crew | Writing | Screenplay, Adaptation |
Grant Whytock | Crew | Editing | Supervising Editor, Producer's Assistant |
 Gregory Ratoff | Crew | Directing | Director |
 Harry Stradling Sr. | Crew | Camera | Director of Photography |
Howard A. Anderson | Crew | Crew | Special Effects |
 Howard Estabrook | Crew | Writing | Adaptation |
Joseph Nussbaum | Crew | Sound | Orchestrator |
Max Golden | Crew | Production | Production Manager |
Nicolai Remisoff | Crew | Art | Production Design, Art Direction |
 Ralph Faulkner | Crew | Crew | Fight Choreographer |
Sam Nelson | Crew | Directing | Assistant Director |
 Walter Plunkett | Crew | Costume & Make-Up | Costume Design |
 William F. Claxton | Crew | Editing | Editor |
Earl Sitar | Crew | Sound | Sound |
Truman K. Wood | Crew | Sound | Sound Effects Editor |
 Akim Tamiroff | Cast | Actor | Baron Colonna |
 Anthony Caruso | Cast | Actor | Baron's Henchman (Uncredited) |
 Charles Stevens | Cast | Actor | Shepherd (Uncredited) |
Count Stefenelli | Cast | Opera Spectator (Uncredited) | |
 Dorothy Vernon | Cast | Actress | Townswoman at Celebration (Uncredited) |
 Douglas Fairbanks Jr. | Cast | Actor | Lucien Franchi / Mario Franchi |
 Eddie Foster | Cast | Actor | Messenger, Alberto's Steward (Uncredited) |
 Edgar Norton | Cast | Actor | Colonna's Barber (Uncredited) |
 Frank Hagney | Cast | Actor | Torture Cell Guard (Uncredited) |
 Gloria Holden | Cast | Actress | Countess Franchi |
 H.B. Warner | Cast | Actor | Dr. Enrico Paoli |
 Henry Brandon | Cast | Actor | Marquis de Raveneau (Uncredited) |
 Henry Wilcoxon | Cast | Actor | Count Victor Franchi |
 Isabel La Mal | Cast | Actress | Opera Spectator (Uncredited) |
 Isabel Randolph | Cast | Actress | Countess Isabelle's Mother (Uncredited) |
 J. Carrol Naish | Cast | Actor | Lorenzo |
 James Craven | Cast | Actor | Giovanni (Uncredited) |
 John Emery | Cast | Actor | Tomasso |
Manart Kippen | Cast | Actor | Martelli |
 Milburn Morante | Cast | Actor | Guard (Uncredited) |
 Nana Bryant | Cast | Actress | Madame Dupre |
 Paul McVey | Cast | Actor | Cousin Philip Franchi (Uncredited) |
 Pedro de Cordoba | Cast | Actor | Count Gravini |
 Ralph Dunn | Cast | Actor | Messenger, Arturo's Steward (Uncredited) |
 Richard Alexander | Cast | Actor | Castle Guard (Uncredited) |
 Rick Vallin | Cast | Actor | De Revenau's Friend at Opera (Uncredited) |
 Roland Varno | Cast | Actor | De Revenau's Friend at Opera (Uncredited) |
Ruth Robinson | Cast | Actress | Angela |
 Ruth Warrick | Cast | Actress | Countess Isabelle Gravini |
 Sarah Padden | Cast | Actress | Nurse |
 Sonia Darrin | Cast | Actress | Opera Spectator (Uncredited) |
 Veda Ann Borg | Cast | Actress | Maria |
 Walter Kingsford | Cast | Actor | Monsieur Dupre |
 William Farnum | Cast | Actor | Priest |
 William Tannen | Cast | Actor | One of Lucien's Men (Uncredited) |
 Wilson Benge | Cast | Actor | The Baron's Butler (Uncredited) |
 Frank Richards | Cast | Actor | Colonna's Henchman (Uncredited) |
| Person | Type | Job | Role(s) |
