Scotland Yard Inspector Davidson discovers who killed Count Mattoni. Due to a legal loophole, however, the killer cannot be tried.
| Name | Type | Role | |
|---|---|---|---|
| Francis Cockrell | Writer | ||
| Alec Coppel | Writer | ||
| Arthur Gould-Porter | Guest Star | ||
| Alan Napier | Guest Star | ||
| John Williams | Guest Star | ||
| Melville Cooper | Guest Star | ||
| Charles Cooper | Guest Star | ||
| Charles Davis | Guest Star | ||
| Nora Marlowe | Guest Star | ||
| Peter Gordon | Guest Star | ||
| Anthony Dawson | Guest Star | ||
| Rosemary Harris | Guest Star | ||
| Robert Stevens | Director |