Cast
- Edith Heerdegen as Mrs. Hewlett
- Reiner Schöne as Freddy Malone
- Ulrich Faulhaber as D'Arcy Tuck
- Anita Lochner as Joan Hewlett
- Frithjof Vierock as Oswald Veal
- Wolfried Lier as Kommissar Sibley
- Peter Capell as Sir George Chudleigh
- Jaspar von Oertzen as Chief Inspektor Grierson
- Eleonore Noelle as Mrs. Orlock
- Wolf Petersen as Herry Kernward