Storyline Roger Henderson, the young son of a wealthy British gentleman, lives in one of those grand British country estates surrounded by huge gardens. When a Rembrandt painting is stolen from the vault in the basement of the mansion, Roger and John Wilson (young son of the butler) discover a secret tunnel leading from the vault to another building on the estate. They then set out on a dangerous mission to bring the smugglers to justice.
| Actor | Role |
|---|---|
 Tony WagerRoger Henderson | Roger Henderson |
| IIvor BowyerJohn Wilson | John Wilson |
 Murray MathesonMr. Henderson | Mr. Henderson |
| GGerald PringMr. Wilson | Mr. Wilson |
| TThelma ReaMrs. Matthews | Mrs. Matthews |
| FFrank HendersonMr. Harvey | Mr. Harvey |
| JJohn H. SullivanInspector Bell | Inspector Bell |
| MMichael KellySlim | Slim |