Sam Laker is an American industrialist, working in Britain, who has just been awarded an international award for industrial design. He is planning to travel to East Germany to attend a trade show and show off his invention, taking his 10 year old son with him for a holiday. Meanwhile a British Intelligence officer who served with Laker in the Second World War decides to use the opportunity of Laker's trip and his lack of an intelligence profile to coerce him into carrying out an assassination.
| Actor | Role |
|---|---|
 Frank SinatraSam Laker | Sam Laker |
 Peter VaughanMartin Slattery | Martin Slattery |
 Nadia GrayKaren Gisevius | Karen Gisevius |
 Toby RobinsRuth | Ruth |
 Derren NesbittColonel Hartmann | Colonel Hartmann |
 Edward FoxRitchie Jackson | Ritchie Jackson |
 Inger StrattonAnna | Anna |
 Cyril LuckhamCabinet minister | Cabinet minister |
| JJ.A.B. Dubin-BehrmannJoseph | Joseph |
| MMichael NewportPatrick Laker | Patrick Laker |
| RRoy HanlonNot listed | Not listed |
| VVictor BeaumontNot listed | Not listed |
 Stanley MeadowsNot listed | Not listed |
 George MurcellNot listed | Not listed |
| JJames PayneMan at Printing Press (uncredited) | Man at Printing Press (uncredited) |