An alien vessel manages to break the earth defense systems. Captain Layton is sent to investigate and find the invaders. Together with friends from the planet Ganymed he discovers the enemies in a hidden underground city on earth.
John Richardson
Yanti Somer
Walter Maestosi
Gaetano Balestrieri
Gisela Hahn
Aldo Canti
Massimo Bonetti
West Buchanan
