Tom, sick of Jerry stealing the milk out of his bowl, poisons it. Instead of killing the mouse, the potion transforms him into a muscular beast.
Unfortunately the movie Dr. Jekyll and Mr. Mouse is not yet available on HBO Max.
| Directing | Joseph Barbera | Director |
| Production | Fred Quimby | Producer |
| Visual Effects | Ed Barge | Animation |
| Sound | Scott Bradley | Original Music Composer |
| Directing | William Hanna | Director |
| Visual Effects | Michael Lah | Animation |
| Visual Effects | Kenneth Muse | Animation |
| Visual Effects | Al Grandmain | Animation |
