Peter van Eyck
Henry B. Travers
Gert Fröbe
Detective Inspector Kras
Wolfgang Preiss
Prof. Jordan / Peter Cornelius / Dr. Mabuse
Werner Peters
Hieronymus B. Mistelzweig
Andrea Checchi
Hotel Detective Berg
David Cameron
Michael Parker
Albert Bessler
Hotelingenieur
Marielouise Nagel
The Blonde Luck
Reinhard Kolldehoff
Roberto Menil aka 'Klumpfuß'
Jean-Jacques Delbo
Cornelius' Butler
Renate Küster
TV announcer
Rolf Moebius
Police-Officer
Dieter Hallervorden
Photojournalist (uncredited)
Bruno W. Pantel
Reporter (uncredited)
Wolfgang Völz
Barkeeper Karl (uncredited)
Werner Buttler
No. 11 (uncredited)
Hans W. Hamacher
BKA-Chef (uncredited)
Egon Vogel
Police doctor (uncredited)
