Directed by
| Irving Pichel | ||
Writing Credits
| Nunnally Johnson | ... | (screenplay) |
| Guy Jones | ... | (novel) and |
| Constance Jones | ... | (novel) |
Cast (in credits order) verified as complete
| William Powell | ... | Mr. Arthur Peabody | |
| Ann Blyth | ... | Lenore - the Mermaid | |
| Irene Hervey | ... | Mrs. Polly Peabody | |
| Andrea King | ... | Cathy Livingston | |
| Clinton Sundberg | ... | Mike Fitzgerald | |
| Art Smith | ... | Dr. Harvey | |
| Hugh French | ... | Major Roger Hadley | |
| Lumsden Hare | ... | Colonel Mandrake | |
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Frederick Clarke | ... | Basil (as Fred Clark) |
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James Logan | ... | Lieutenant |
| Mary Field | ... | Wee Shop Clerk | |
| Beatrice Roberts | ... | Mother | |
| Cynthia Corley | ... | Miss Watkins - Nurse | |
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Tom Stevenson | ... | Charlie - Waiter |
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Mary Somerville | ... | Lady Trebshaw |
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Dick Ryan | ... | Bartender (as Richard Ryan) |
| Robert Hyatt | ... | Boy (as Bobby Hyatt) | |
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Ivan Browning | ... | Sidney (as Ivan H. Browning) |
| Rest of cast listed alphabetically: | |||
| Lydia Bilbrook | ... | Woman (voice) (uncredited) | |
| Winifred Harris | ... | Woman (voice) (uncredited) | |
| Ola Lorraine | ... | Receptionist (uncredited) | |
| Carol Savage | ... | Daphne (uncredited) | |
Produced by
| Gene Fowler Jr. | ... | associate producer |
| Nunnally Johnson | ... | producer |
Music by
| Robert Emmett Dolan | ||
Cinematography by
| Russell Metty | ... | director of photography |
Editing by
| Marjorie Fowler | ||
Art Direction by
| Bernard Herzbrun | ||
| Boris Leven | ||
Set Decoration by
| Russell A. Gausman | ... | (set decorations) |
| Ruby R. Levitt | ... | (set decorations) |
Costume Design by
| Grace Houston | ... | (gowns) |
Makeup Department
| Carmen Dirigo | ... | hair stylist |
| Bud Westmore | ... | makeup artist |
Production Management
| Lew Leary | ... | production manager (uncredited) |
Second Unit Director or Assistant Director
| Fred Frank | ... | assistant director |
Sound Department
| Leslie I. Carey | ... | sound |
| Corson Jowett | ... | sound |
Visual Effects by
| Frank Tipper | ... | effects animator (uncredited) |
Stunts
| Nancy Tribble | ... | underwater double: Ann Blyth |
Camera and Electrical Department
| David S. Horsley | ... | underwater scenes photographed by |
| Maurice Goldberg | ... | still photographer (uncredited) |
| James V. King | ... | camera operator (uncredited) |
| Philip H. Lathrop | ... | camera operator (uncredited) |
| Dean Paup | ... | grip (uncredited) |
Costume and Wardrobe Department
| Charles Gemora | ... | sculptor: mermaid tail (uncredited) |
| Eugene Joseff | ... | costume jeweller (uncredited) |
Music Department
| Ethmer Roten | ... | musician: flute (uncredited) |
Script and Continuity Department
| Julia Marcia Davies | ... | script supervisor (uncredited) |
Additional Crew
| Jay Hyde | ... | production aide |