Directed by
| Robert McKimson | ||
Writing Credits
| Michael O'Connor | ... | (story) |
Cast (in credits order) complete, awaiting verification
| Mel Blanc | ... | Daffy Duck / Speedy Gonzales / Cat Effects / Butch (voice) | |
| Pedro Gonzalez Gonzalez | ... | Dr. Mañuel Jose 'Olvera Sebastian Rudolfo Ortiz Pancho Jiminez Perez III (voice) (as Gonzales Gonzales) | |
Produced by
| David H. DePatie | ... | producer |
| Friz Freleng | ... | producer |
Music by
| Walter Greene | ||
Editing by
| Lee Gunther | ||
Camera and Electrical Department
| John Burton Jr. | ... | camera operator (uncredited) |
Animation Department
| Warren Batchelder | ... | animator |
| Ted Bonnicksen | ... | animator |
| George Grandpré | ... | animator (as George Grandpre) |
| Bob Matz | ... | animator |
| Norm McCabe | ... | animator (as Norm Mc Cabe) |
| Tom O'Loughlin | ... | background artist |
| Manuel Perez | ... | animator (as Manny Perez) |
| Dick Ung | ... | layout artist |
