Bill & Ben are twins who work at the China Clay Pits. One day, they are aghast when they discover that their trucks have gone missing! Down the line, they cause great problems and difficulty with a diesel called Boco, who they believe stole the trucks. Confusion regains until Edward explains everything.
| Name | Type | Role | |
|---|---|---|---|
| Rev. W. Awdry | Writer | ||
| David Mitton | Director |