Lavinia Kean, a brilliant American espionage agent, combats the wiles of international criminal and blackmailer Cesare Magnasco.
| Actor | Role |
|---|---|
 Cornelia SharpeLavinia Kean | Lavinia Kean |
 Omar SharifBaron Cesare Magnasco | Baron Cesare Magnasco |
 Robert LansingOwen Hooper | Owen Hooper |
 Anita EkbergDr. Else Biebling | Dr. Else Biebling |
 Fabio TestiRudolf Caserta | Rudolf Caserta |
 William TraylorLacey | Lacey |
| IIsabella RyeFanya | Fanya |
 Thom ChristopherEddie Bronzi | Eddie Bronzi |
 Mario ColliAlfredo Mucci | Alfredo Mucci |
 Claudio RuffiniLarue | Larue |
 Geoffrey CoplestonUN Speaker | UN Speaker |
 Fortunato ArenaPaesano | Paesano |
 Gino MarturanoMaj. Danilo | Maj. Danilo |
 Emilio MessinaZel | Zel |