Former CIA man, Bill Fenner, now a downbeat, loner journalist, is sent to Venice to investigate the shock suicide bombing by an American diplomat at a peace conference.
| Actor | Role |
|---|---|
 Robert VaughnBill Fenner | Bill Fenner |
 Felicia FarrClaire Connor | Claire Connor |
 Karlheinz BöhmRobert Wahl | Robert Wahl |
 Luciana PaluzziGiulia Almeranti | Giulia Almeranti |
 Boris KarloffDr. Pierre Vaugiroud | Dr. Pierre Vaugiroud |
 Roger C. CarmelMike Ballard | Mike Ballard |
 Ed AsnerFrank Rosenfeld | Frank Rosenfeld |
 Joe De SantisJan Aarvan | Jan Aarvan |
 Fabrizio MioniRusso | Russo |
| BBill WeissGoldsmith | Goldsmith |
 Elke SommerSandra Fane | Sandra Fane |
 Wesley LauNeill Carlson | Neill Carlson |