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Boris Karloff as Baron Boris von Frankenstein (voice) |
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Allen Swift as Felix Flankin / Yetch / Dracula / Invisible Man / Dr. Jekyll / Mr. Hyde / Additional Voices |
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Gale Garnett as Francesca (voice) |
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Phyllis Diller as The Monster's Mate (voice) |
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Ethel Ennis as Title Song Singer (voice) |
| Directing | Jules Bass | Director |
| Writing | Len Korobkin | Writer |
| Writing | Harvey Kurtzman | Writer |
| Sound | Maury Laws | Songs |
| Writing | Jules Bass | Lyricist |
| Writing | Arthur Rankin, Jr. | Story |
| Writing | Forrest J. Ackerman | Writer |
| Sound | Maury Laws | Music |
| Production | Jules Bass | Producer |
| Production | Joseph E. Levine | Executive Producer |
| Production | Arthur Rankin, Jr. | Producer |
| Production | Larry Roemer | Associate Producer |
| Crew | 持永只仁 | Cinematography |
| Directing | Kizo Nagashima | Assistant Director |
| Visual Effects | Jack Davis | Character Designer |
| Crew | Killer Joe Piro | Choreographer |
| Writing | Bram Stoker | Characters |
| Writing | Mary Shelley | Characters |
| Writing | Victor Hugo | Characters |
| Writing | H. G. Wells | Characters |
| Writing | Robert Louis Stevenson | Characters |
