Overview
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.
| Actor | Age then | Age now | |
|---|---|---|---|
 | 16 | 93 | |
| - | - | |
| 14 | April 22, 2008 (74) | |
| - | - | |
| 5 | 82 | |
 | 47 | May 26, 1971 (70) | |
 | 7 | 85 |