 | Boris Karloff als Baron Boris von Frankenstein (voice) |
 | Allen Swift als Felix Flankin / Yetch / Dracula / Invisible Man / Dr. Jekyll / Mr. Hyde / Additional Voices |
 | Gale Garnett als Francesca (voice) |
 | Phyllis Diller als The Monster's Mate (voice) |
 | Ethel Ennis als Title Song Singer (voice) |
| Jules Bass | Director |
| Harvey Kurtzman | Writer |
| Len Korobkin | Writer |
| Joseph E. Levine | Executive Producer |
| Maury Laws | Music |
| Arthur Rankin, Jr. | Story |
| Larry Roemer | Associate Producer |
| Arthur Rankin, Jr. | Producer |
| Forrest J. Ackerman | Writer |
| Jules Bass | Producer |
| Kizo Nagashima | Assistant Director |
| Tadahito Mochinaga | Cinematography |
| Maury Laws | Songs |
| Jules Bass | Lyricist |
