as Alfredo Capelli
as Thomas Dekker Sr. (edited from: Kautschuk) (archive footage) (uncredited)
as Fürst Ramigani
as Ivamoura, Youki's brother
as Robert Devoy
as Henry Arthur 'Der Hexer' Milton
as Eduard Fabricius
as Bernard
as Prince Ramigani
as Dr. Diener
as Beppo
as Hannes Hallgarten
as Arthur Milton
as Maillezais, Unterhändler des Königs
as Lindford
as Kurt Tromba, Tigerdompteur
as Lakamba
as Gravic
as Napoleon
as Major Kazanow
as Gaston Thibault
as Mittelstürmer Werner Fehling
as Kovak
as Captain Percy Forbes, British Chief Agent
as Hermann
as Ludwig van Beethoven
as Dr. Paul Meinhardt
as Kommissar Dr. Hennings
as Förster Knarrtje (voice)
as Olaf Hansen
as Schiller
as Gawan Massi
as Groppi
as Stefan Gorgas
as Alfredo Codona
as Niels Terström
as Robert Torreani
as Tabaret
as Wan Tan
as Kapitän Tonning
as Fedor
as Karl Ludwig Faerber
as Sergei Gavrilovitch Schuvalov
as Grenadier Emil Sasse
as Dr. med. Steininger
as Henry Wickham
as Nils Ascan
as I. Offizier Rohlfs
as Ernst Jakob Renz
as Oberinspektor Düwell
as Onkel Franz
as Viktor
as Werkstatter Rudi Winkler
as Viktor Hoffmann, Pressephotograph
as Günther Imhoff
as Heinz Lansky
as Kriminalkommissar Wagner
as Kriminalinspektor Bracht
as Großvater
as Robert Seipold
as Philip Cooper
