Directed by
| Burgess Meredith | ||
Writing Credits
| Burgess Meredith | ... | (screenplay) |
| Joseph Zucchero | ... | (story) and |
| Alvin Ostroff | ... | (story) |
Cast (in credits order)
| James Mason | ... | Y.Y. Go | |
| Jack MacGowran | ... | Leo Zimmerman (as Jack McGowran) | |
| Irene Tsu | ... | Tah-Ling | |
| Jeff Bridges | ... | Nero Finnegan (as Jeffrey Bridges) | |
| Peter Lind Hayes | ... | Prof. Robert Bannister | |
| Clarissa Kaye-Mason | ... | Zelda (as Clarissa Kaye) | |
| Burgess Meredith | ... | The Dolphin | |
 |
Gigo Tevzadze | ... | Dr. Ading |
| King Hu | ... | Ito Suzuki (as King Ho) | |
| Broderick Crawford | ... | Parker | |
| Jay Adler | ... | Dr. Yul | |
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June Sampson | ... | Miss Hagen |
| Rest of cast listed alphabetically: | |||
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Robert Cabot | ... | Clay (uncredited) |
| Valentine Dyall | ... | Narrator (uncredited) | |
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Chin Hsiao | ... | Tang (uncredited) |
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Jen Kwan | ... | Funerary Procession Monk (uncredited) |
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Yun-Wu Li | ... | Fishmonger (uncredited) |
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Liv Lindeland | ... | (uncredited) |
| Chun-Ku Lu | ... | CIA Operative (uncredited) | |
| Robert Shayne | ... | U.S. Senator (uncredited) | |
Produced by
| Jim Cranston | ... | associate producer (as James Cranston) |
| Robert H. Oliver | ... | producer |
| Dick Randall | ... | producer (as Robert H. Oliver) / producer (uncredited) |
| Thomas I. Ross | ... | producer |
Music by
| Robert O. Ragland | ||
| Nicholas Carras | ... | (uncredited) |
Cinematography by
| John M. Stephens | ... | director of photography (as John Stephens) |
Editing by
| Richard K. Brockway | ... | (as Richard Brockway) |
| Jack Tucker | ... | (uncredited) |
Art Direction by
| Dong Kingman | ||
Makeup Department
| Marvin G. Westmore | ... | makeup artist (as Marvin Westmore) |
Production Management
| John Chang | ... | production manager |
Second Unit Director or Assistant Director
| Chaplin Chang | ... | assistant director (as Chaplin Chan) |
Art Department
| Dong Kingman | ... | set designer |
Sound Department
| Tommy Santos | ... | sound mixer |
Costume and Wardrobe Department
| Virginia Fung | ... | costume supervisor |
Music Department
| John Caper Jr. | ... | music supervisor |
| Robert O. Ragland | ... | conductor / music arranger |
Script and Continuity Department
| Terry Bourke | ... | script supervisor |
Additional Crew
| William Furnival | ... | assistant to associate producer |
