Sylvester Cat checks in to work at a museum with his son, Junior. He is bragging about his mouse-catching prowess when the baby kangaroo, Hippety Hopper, having escaped from the zoo, turns up in the museum. Sylvester and Junior, as usual, mistake Hippety for a giant mouse and chase him around the exhibits.
| Actor | Role |
|---|---|
 Mel BlancSylvester / Junior (voice) | Sylvester / Junior (voice) |