The Adventures of the Scarlet Pimpernel S01 E13 The Flower Woman

The lovely Comtesse la Valliere, formerly a spy for Chauvelin, changes sides when she learns of the impending execution of dozens of moderate French revolutionaries. Teaming with the Scarlet Pimpernel and his men, the Comtesse plans to rescue the condemned men - from under Chauvelin's nose.