An arson investigator goes undercover to break up a ring that sets fires in order to collect the insurance.
| Actor | Role |
|---|---|
 Robert LoweryJoe Martin | Joe Martin |
 Anne GwynneJane Jennings | Jane Jennings |
 Edward BrophyPete Purdy | Pete Purdy |
 Marcia Mae JonesBetty - Fender's Secretary | Betty - Fender's Secretary |
 Douglas FowleyFrederick P. 'Fred' Fender | Frederick P. 'Fred' Fender |
 Maude EburneGrandma | Grandma |
 William ForrestDeputy Fire Chief / Narrator | Deputy Fire Chief / Narrator |
 Steve PendletonMurph, the undercover man (as Gaylord Pendleton) | Murph, the undercover man (as Gaylord Pendleton) |
 Byron FoulgerThomas Peyson | Thomas Peyson |
 Matt McHughHubbell | Hubbell |
| LLelah TylerMrs. Peyson | Mrs. Peyson |
 Emmett VoganAl, Night Watchman | Al, Night Watchman |
 John MaxwellDetective | Detective |
| RRichard DavidJunior Peyson | Junior Peyson |
 John ForsytheRace Track Aannouncer (voice, uncredited) | Race Track Aannouncer (voice, uncredited) |