Joachim Fuchsberger as Inspektor Higgins

Uschi Glas as Ann Portland

Grit Boettcher as Betty Falks

Siegfried Schürenberg as Sir John

Konrad Georg as Keyston

Harry Riebauer as Mark Denver

Tilly Lauenstein as Harriet Foster

Ilse Pagé as Secretary

Siegfried Rauch as Frank Keeney

Claus Holm as Glenn Powers

Günter Meisner as Greaves

Hans Epskamp as Bannister

Heinz Spitzner as Harrison

Jan Hendriks as Brent

Rudolf Schündler as Sergeant Hanfield

Narziß Sokatscheff as Cress Bartling

Tilo von Berlepsch as Dr. Shinewood

Kurt Waitzmann as Carrington

Suzanne Roquette as Mary Houston

Susanne Juhnke as June Bell

Inge Sievers as Mildred Miller

Ewa Strömberg as Pam Walsbury

Bruno W. Pantel as Busschaffner

Kurt Buecheler as Winston Robson

Wilhelm Vorwerg as Dr. Cabble