A mysterious magnetic spool found during a construction project is discovered to have originated from Venus. A rocket expedition to Venus is launched to discover the origin of the spool and the race that created it.
Prof. Harringway Hawling
Oldřich Lukeš
Prof. Saltyk
Ignacy Machowski
Talua, afrikanischer Fernsehtechniker
Julius Ongewe
Prof. Arsenew
Mikhail Postnikov
Prof. Sikarna
Kurt Rackelmann
Robert Brinkmann, deutscher Pilot
Günther Simon
Dr. Tchen Yu
Hua-Ta Tang
Joan Moran
Lucyna Winnicka
Sumiko Ogimura, japanische Ärztin
Yoko Tani
Frau Arsenjew
Ruth-Maria Kubitschek
Reporterin
Eva-Maria Hagen
Karen Fredersdorf
Gertraud Kreissig
Werner Senftleben
Wüstenarbeiter (uncredited)
Nico Turoff
Weimann, Kernphysiker
Eduard von Winterstein
Scientist (uncredited)
Stanisław Igar
Scientist (uncredited)
Artur Młodnicki
Scientist (uncredited)
Józef Pieracki