Young auxiliary fire-fighters are suspected of arson.
| Actor | Role |
|---|---|
 Simon Gipps-KentBob | Bob |
| SSharon FusseySally | Sally |
 George BakerStation Officer Harrison | Station Officer Harrison |
 Sam KyddStark | Stark |
| JJoseph BradyDet. Sgt. Carter | Det. Sgt. Carter |
 Ken KitsonDet. Cons. Palmer | Det. Cons. Palmer |
| VVincent HallTim | Tim |
 Glyn OwenMr. Grant | Mr. Grant |
 Anne StallybrassMrs. Grant | Mrs. Grant |
| DDavid AllisterJordan | Jordan |
| RRichard WrenMike | Mike |
| DDavid HoweTerry | Terry |