The Adventures of the Scarlet Pimpernel

Gentlemen of the Road (1x17)

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When a beautiful woman shows an unusual interest in the Prince Regent's affairs, Sir Percy uncovers a plot to assassinate the Hanovarian Prince Regent using highwaymen, and restore a Stuart King to the throne of Great Britain. The Scarlet Pimpernel becomes a gentleman of the road to thwart the plan.