Slip has entered the Boys' rattletrap car in a souped-up jalopy race, but has no chance of winning until Satch, with the aid of a scientist acquaintance, comes up with a chemical concoction that acts as a super-fuel; but a rival entrant in the race learns of this and tries to get the formula for himself.
Unfortunately the movie Jalopy is not yet available on HBO Max.
| Production | Ben Schwalb | Producer |
| Writing | Jack Crutcher | Screenplay |
| Directing | William Beaudine | Director |
| Writing | Tim Ryan | Screenplay |
| Production | Allen K. Wood | Production Supervisor |
| Crew | Harry Neumann | Cinematography |
| Art | Dave Milton | Art Direction |
| Crew | Ray Mercer | Special Effects |
| Art | Robert Priestley | Set Decoration |
| Editing | William Austin | Editor |
| Sound | Charles Cooper | Sound Recordist |
| Directing | Austen Jewell | Assistant Director |
| Sound | Marlin Skiles | Music |
