Scotland Yard Inspector Davidson continues in his investigation of the murder of Count Mattoni. He discovers that each suspect not only appears guilty, but also admit to having committed the crime.
| Name | Type | Role | |
|---|---|---|---|
| Alec Coppel | Writer | ||
| Francis Cockrell | Writer | ||
| George Pelling | Guest Star | ||
| Anthony Dawson | Guest Star | ||
| Arthur Gould-Porter | Guest Star | ||
| Roxanne Arlen | Guest Star | ||
| Rosemary Harris | Guest Star | ||
| Jered Barclay | Guest Star | ||
| Charles Cooper | Guest Star | ||
| Alan Napier | Guest Star | ||
| John Williams | Guest Star | ||
| Melville Cooper | Guest Star | ||
| Charles Davis | Guest Star | ||
| Robert Stevens | Director |