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Frank Baxter as Himself |
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Richard Carlson as Mr. Fiction Writer |
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Mel Blanc as Squirrel / Turtle / Alligator / Rabbit (voice) |
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Sterling Holloway as Lab assistant |
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Marvin Miller as Hemo / Professor Anatomy |
| Directing | Frank Capra | Director |
| Directing | William T. Hurtz | Director |
| Writing | Frank Capra | Writer |
| Editing | Frank P. Keller | Editor |
| Production | Joseph Sistrom | Associate Producer |
| Production | Frank Capra | Producer |
| Camera | Harold E. Wellman | Director of Photography |
| Directing | Arthur S. Black Jr. | Assistant Director |
| Sound | Archie Dattelbaum | Sound Effects |
| Visual Effects | William T. Hurtz | Animation Director |
| Visual Effects | Shamus Culhane | Animation |
| Sound | Raoul Kraushaar | Music Supervisor |
| Production | Nancy Pitt | Researcher |
