When Maddox hires Polish fixer Housemartin to find and hold Harry, Jean uses her wits and a wiretap to find out where he is, while Dalby warns the Minister that the American government is threatened by an imminent coup d'état. Harry is tormented by fears of what has been planted in his mind, but is lured to the country house where prime minister Harold Macmillan is to meet US president John F Kennedy.

S1 Ep6 50min