Plot
David and Monty are two friends of Susan and Betty Potter whose father runs a fleet of lorries. One by one, his lorries are involved in accidents and sabotage is suspected. The children are determined to find the culprits.
| Writer | Mary Cathcart Borer |
|---|---|
| Director | John Baxter |
| Actor | Douglas Barr, Ivor Bowyer, Angela Glynne |
| Country | United Kingdom |
| Production | Elstree Independent Films Ltd. |