Ajax the killer gorilla has escaped from the zoo. Donald's nephews dress up as a gorilla, but soon Donald encounters the real gorilla, and they chase each other until the radio broadcasts instructions for subduing Ajax.
| Directing | Bill Herwig | Layout |
| Visual Effects | Jack King | Animation |
| Production | Walt Disney | Producer |
| Sound | Oliver Wallace | Original Music Composer |
| Visual Effects | Charles A. Nichols | Animation |
| Visual Effects | Judge Whitaker | Animation |
| Visual Effects | Marvin Woodward | Animation |
| Visual Effects | Paul Allen | Animation |
| Visual Effects | George Nicholas | Animation |
| Directing | Jack King | Director |
| Visual Effects | Joshua Meador | Animation |
| Writing | Nick George | Story |
| Writing | Roy Williams | Story |
| Writing | Carl Barks | Story |
| Writing | Jack Hannah | Story |
| Writing | Bill Berg | Story |
| Writing | Frank Tashlin | Story |
| Writing | Bill de la Torre | Story |
| Writing | Jesse Marsh | Story |
