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.
John Baxter | Director |
Mary Cathcart Borer | Writer |
Geoffrey Orme | Writer |
Barbara K. Emary | Associate Producer |
Jo Jago | Director of Photography |
John Baxter | Producer |
Vi Burdon | Editor |
Monica Ross | Sound |