| Count |
Andras | Gerald Wade's friend |
| Rupert |
Bateman | Oswald's private secretary. Aka: Pongo |
| Superintendent |
Battle | Superintendent from Scotland Yard |
| John |
Bauer | New servant at Chimneys |
| Alastair Edward |
Brent | 9th Marquis of Caterham |
| Eileen |
Brent | Lord Caterham's daughter. Aka: Bundle |
| Dr. |
Cartwright | The Cootes' doctor |
| Dr. |
Cassell | The doctor Bundle approached |
| Henry |
Caterham | Lord Caterham's brother |
| Lord |
Caterham | Brent's father, owner of Chimneys |
| Marcia |
Caterham | Marchioness of Caterham, Lord Caterham's sister-in-law |
| Mrs. |
Coker | Old lady who lives with Loraine |
| Lady |
Coote | Oswald's wife. Aka: Maria |
| Oswald |
Coote | Self-made millionaire |
| Helen |
Daventry | One of the Cootes' guests |
| Nancy |
Daventry | One of the Cootes' guests |
| Vera |
Daventry | One of the Cootes' guests. Aka: Socks |
| Ronny |
Devereux | Bill's colleague |
| Stanley |
Digby | The Air Minister |
| Francis |
Drake | Guest at Chimneys |
| Mr. |
Eberhard | German inventor |
| Bill |
Eversleigh | Guest, works at the Foreign Office |
| Mrs. |
Howell | Housekeeper |
| George |
Lomax | Bill's boss, Cabinet Minister. Aka: Codders |
| Mrs. |
Macatta | George Lomax's girlfriend |
| William |
MacDonald | The gardener |
| Colonel |
Melrose | Chief Constable of the county |
| Mr. |
Mosgorovsky | Owner of the Seven Dials nightclub |
| Mr. |
Murgatroyd | The clock seller |
| Terence |
O'Rourke | Stanley Digby's secretary |
| Hayward |
Phelps | American journalist |
| Anna |
Radzky | Guest at Wyvern Abbey, well-known figure in Hungary |
| Babe |
St. Maur | Bill's lady friend, New York actress |
| Jimmy |
Thesiger | The Cootes' guest |
| Gerald |
Wade | One of the Cootes' guests, murdered |
| Loraine |
Wade | Gerald Wade's step-sister |
| Alfred |
| Former second footman at Chimneys, now works at Seven Dials Club |
| Jemima |
| Jimmy's aunt |
| Selina |
| Bundle's great-aunt who married a Thesiger |
| Stevens |
| Jimmy's servant |
| Tredwell |
| The butler |
