Mr. Palfrey of Westminster , Series 1 : Once Your Card Is Marked

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Once Your Card Is Marked: Palfrey's new boss wants him to nail a misfit diplomat whom everyone suspects is spying for the Soviets. But Palfrey believes someone is making the man a scapegoat, and he decides to find out why.

Starring: Alec McCowen, Caroline Blakiston, Clive Wood, Briony McRoberts.