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Artúr Somlay
as Ákos Lóránt professzor
Ádám Szirtes
as István Kádas
Sándor Pécsi
as Forgács
Éva Spányik
as Éva Takács
Mária Sulyok
as Kádas's mother
Hilda Gobbi
as Lotte
Gyula Benkő
as Ferenc Örvös
István Somló
as Thompson
Tivadar Uray
as McLane
Károly Kovács
as Dr. Conrad
László Kemény
as Greenwood
István Velenczei
as Boswall
Lajos Soós
as Gábor, driver
György Bárdy
as Security Officer
János Dömsödi
as
Jenõ Horváth
János Zách
as Gál is a teammate
József Berky
Lajos Sugár
János Horkay
Beno Tamas
Zoltán Várkonyi
as comrade Mérnök
László Csákányi
Gyula Bakos
László Egri
Péter Bacsó
Writer
Mihály Lehmann
Sound
Zoltán Kerényi
Editor
Director
Mátyás Varga
Production Design
János Kerekes
Music
István Eiben
Director of Photography
