Tom designs a better mousetrap that would have made Rube Goldberg jealous. While he sleeps, the mouse that Tom drew wakes Jerry and they get chased by the cat Tom drew. As Tom awakes, they make a strategic alteration to the design.
Unfortunately the movie Designs on Jerry is not yet available on HBO Max.
| Directing | William Hanna | Director |
| Sound | Scott Bradley | Original Music Composer |
| Visual Effects | Ed Barge | Animation |
| Visual Effects | Kenneth Muse | Animation |
| Directing | Joseph Barbera | Director |
| Art | John Didrik Johnsen | Background Designer |
| Visual Effects | Irven Spence | Animation |
| Production | Fred Quimby | Producer |
