Peter Weck as Prof. Dr. Stefan Burger

Gitte Hænning as Renate 'Rena' Larsen

Margit Nünke as Countess Melanie

Grethe Weiser as Mrs. Applewhite

Gunther Philipp as Joshua Graham

Mady Rahl as Guest in Hotel

Joseph Egger as Sebastian Holl

Franz Muxeneder as Zyprian

Rudolf Schündler as Prof. Krusius

Thomas Alder as Thomas Holl

Bill Ramsey as Camper

Raoul Retzer as Sales Clerk

Uta Levka as Gladis

Marlene Warrlich as Susi

Otto F. Hænning as Consul Larsen

Peter Fröhlich as Robert von Zarewski