Directed by
| Ralph Bakshi | ... | (supervising director) |
Writing Credits
| Dr. Seuss | ... | (book) |
| Dr. Seuss | ... | (written for television by) |
Cast (in credits order)
| Charles Durning | ... | Grandfather (voice) | |
 |
Christopher Collins | ... | Chief Yookeroo / Various Yooks (voice) |
| Miriam Flynn | ... | Yookie-Ann Sue / Teacher / Various Yooks (voice) | |
| Clive Revill | ... | Van Itch (voice) | |
| Joseph Cousins | ... | Grandson (voice) | |
| Rest of cast listed alphabetically: | |||
| Jim Cummings | ... | Various Yooks (voice) | |
| Hal Smith | ... | Various Yooks (voice) | |
Produced by
| Ralph Bakshi | ... | producer |
| Dr. Seuss | ... | executive producer (as Theodor Geisel) |
Music by
| Glen Daum | ||
Editing by
| Brad Gunther | ||
Production Management
| Sherry Gunther | ... | production supervisor (as Sherry Argaman) |
Art Department
| Kent Butterworth | ... | storyboard artist |
| David Marshall | ... | storyboard artist |
| Tom Minton | ... | storyboard artist |
| Jim Reardon | ... | storyboard artist |
Sound Department
| Philip Phillipson | ... | sound reader (as Phil Phillipson) |
Animation Department
| Marcia Adams | ... | background color key |
| Kent Butterworth | ... | animation director |
| Kent Holaday | ... | mouth animation synchronization |
| Mike Kazaleh | ... | layout artist |
| Sandra Kumashiro | ... | layout checker |
| David Marshall | ... | animation director |
| Jeff Pidgeon | ... | models |
| Chris Reccardi | ... | layout artist |
| Linda Redondo | ... | color modeler |
| Rose Ann Stire | ... | color modeler (as Roseanne Stire) |
| Louise Zingarelli | ... | layout artist |
Music Department
| Glen Daum | ... | composer: original song music |
| Lee Ann Ledgerwood-Steig | ... | composer: original song music (as LeeAnn Ledgerwood) |
| Jeremy Steig | ... | composer: original song music |
| John Moses | ... | musician (uncredited) |
