The Whistle Blower [from John Hale’s novel] is a highly charged conspiracy theory drama. A murdered man, played by Nigel Havers, worked as a Russian translator at the top-secret listening center, GCHQ, in Cheltenham.
Michael Caine is excellent as his father, a role rather similar to that played by Jack Lemmon in Missing – a non-political, middle-aged man who’s driven to radical action as a result of what the government he once trusted has done to his son.
The central sections, as Caine doggedly insists on finding out who killed his son and why, are tautly handled, creating considerable tension. Unfortunately, the film ends rather lamely, almost as if the writer wasn’t sure how to finish it.