A secret agent possesses a ring that makes him invisible for a short time, once every 10 hours. He is in pursuit of an evil criminal mastermind but, at the same time, must evade an enemy agent who also wants the ring.
Patrick O'Neal
as Perry 'Matchless' Liston
Ira von Fürstenberg
as Arabella
Donald Pleasence
as Gregori Andreanu
Henry Silva
as Hank Norris
Nicoletta Machiavelli
as Tipsy
Howard St. John
as General Shapiro
Sorrell Booke
as Colonel Coolpepper
Tiziano Cortini
as Hogdon (as Lewis Jordan)
Elisabetta Wu
as O-Lan (as Elisabeth Wu)
Eddra Gale
as
