Mickey and the gang play detective. Later, the dog gets stuck with a professor's time bomb.
| Actor | Role |
|---|---|
 Mickey RooneyMickey McGuire | Mickey McGuire |
 Delia BogardTomboy Taylor | Tomboy Taylor |
 Billy BartyMickey's Brother | Mickey's Brother |
| JJimmy RobinsonHambone Johnson | Hambone Johnson |
| BBuddy BrownStinky Davis | Stinky Davis |
 Kendall McComasKid in Bear Costume | Kid in Bear Costume |
 Marvin StephensKatrink | Katrink |