U.S. Secret Service agent Peter Novak goes undercover with Scotland Yard officer Thompson to halt a murderous gang of counterfeiters known as the Golden Goose. Although Peter is unsure about John's loyalties, the two infiltrate the gang and win the trust of thug Nick "The Owl" Harrison before enduring a series of double-crosses.
| Actor | Role |
|---|---|
 Yul BrynnerPeter Novak | Peter Novak |
 Charles GrayHarrison, 'The Owl' | Harrison, 'The Owl' |
 Edward WoodwardArthur Thompson | Arthur Thompson |
 John BarrieSupt. Sloane | Supt. Sloane |
 Adrienne CorriAngela 'Tina' Richmond | Angela 'Tina' Richmond |
 Graham CrowdenSmythe | Smythe |
 Walter GotellGeorge Leeds | George Leeds |
 Anthony JacobsFirenos | Firenos |
 Ivor DeanReynolds | Reynolds |
 Hugh McDermottRay Moss | Ray Moss |
 Hilary DwyerAnn Marlowe | Ann Marlowe |
 Ken JonesStroud | Stroud |
 Karl StepanekMueller | Mueller |
 Bernard ArchardCollins | Collins |
| GGeoffrey ReedMartin | Martin |
| JJan RossiniDebbie | Debbie |
| JJoe CorneliusGordie | Gordie |
| PPaddy WebsterMary | Mary |
 Denis ShawVance | Vance |
| AAnita PrynneGenevieve | Genevieve |
| PPhillip RossCarter | Carter |
 Arnold DiamondPollard | Pollard |
 Philip AnthonyTechnician | Technician |
| LLarry TaylorThug | Thug |
 Delia LindsayDancer at Party (uncredited) | Dancer at Party (uncredited) |