Directed by
| Friz Freleng | ... | (uncredited) |
| Hugh Harman | ... | (uncredited) |
Writing Credits (in alphabetical order)
| Jack Cosgriff | ... | (story) (uncredited) |
| Charles McGirl | ... | (story) (uncredited) |
Cast
| Mel Blanc | ... | Raven / Dr. Jekyll / Giant Bookworm (voice) (uncredited) | |
 |
Frank Elmquist | ... | Various (voice) (uncredited) |
|
|
Kent Rogers | ... | Mr. Hyde (uncredited) |
Produced by
| William Hanna | ... | co-producer (uncredited) |
| Hugh Harman | ... | producer |
| Fred Quimby | ... | producer (uncredited) |
Music by
| Scott Bradley | ... | (uncredited) |
Production Management
| Carman Maxwell | ... | production manager (uncredited) |
Sound Department
| Fred MacAlpin | ... | sound effects editor (uncredited) |
Animation Department
| Gus Arriola | ... | character designer (uncredited) |
| George Gordon | ... | animator (uncredited) |
| John Meandor | ... | layout artist (uncredited) |
| Leonard Sebring | ... | animator (uncredited) |
| Joseph Smith | ... | background artist (uncredited) |
| Irven Spence | ... | animator (uncredited) |
| Rudy Zamora | ... | animator (uncredited) |
| Jack Zander | ... | animator (uncredited) |
Music Department
| Scott Bradley | ... | musical director |
