At the racetrack, cleaner, Willy Joy is tricked into buying Lindy Lou, a useless greyhound, who's not too healthy either. While getting the dog back in shape, Willy crosses paths with a gang of crooks who's specialty is fixing the races with doped dogs.
| Actor | Role |
|---|---|
| FFrankie HowerdWillie Joy | Willie Joy |
 Stanley HollowayCaptain Jack Montague | Captain Jack Montague |
 Alfie BassBlagg | Blagg |
 Lionel JeffriesBert Benton | Bert Benton |
 Susan BeaumontSusan Storer | Susan Storer |
 A.E. MatthewsLord Reginald Cranfield | Lord Reginald Cranfield |
 Tony WrightVincent | Vincent |
 Joan HicksonLady Emily Cranfield | Lady Emily Cranfield |
 Terence LongdonJohn Wyndham | John Wyndham |
 Colin GordonMax, 1st Commentator | Max, 1st Commentator |
 Richard WattisCarruthers | Carruthers |
 Danny GreenPlug Ugly | Plug Ugly |
 Barbara ArcherMarlene | Marlene |
| WWilliam KendallBlenkinsop | Blenkinsop |
 Ewen SolonHaines | Haines |
 Reginald BeckwithSmithers | Smithers |
| PPhilip StewartDog Track Crowd | Dog Track Crowd |
| AAlf DeanNot listed | Not listed |