Callan - Season 3 (1970)

The entire section goes on red alert when Liz, Hunter's ever-punctual secretary, fails to show up for work. Trying to trace her, Callan begins to suspect that Liz's disappearance involves not an enemy from the present, but a ghost from her past.

Lady Janet Lewis--the beautiful widow of an ex-foreign secretary--accepts a TV producer's lucrative offer for an interview about her husband. Suspicious of the producer's intentions, Hunter assigns Callan to stop her, but the assignment gets personal.

When Heathcote Land receives incriminating photos of his company's sales manager in bed with a mistress, Callan tries to persuade him not to expose the man. But Land knows too well how such games are played.

Callan must break up the engagement between a lovely NATO interpreter with a grade-A security clearance and a man suspected of serving as a KGB informant. Does the woman's fiance really love her? Or does he love Moscow more?

By surrendering to the police, wily KGB operative Nikolai Lubin seeks safety in a British prison, out of reach of Hunter and the section's interrogators. Hunter, however, has other plans--engineering Lubin's "escape" under the guise of a KGB operation.

Amos Green is a politician with the combustible view that "coloured immigration is dangerous to Britain and must stop".