Madam Secretary Season 3, Episode 23 : Article 5

In the season finale, Elizabeth heads to Brussels to seek NATO'S support against Russia when it threatens to invade Bulgaria, but when France refuses to cooperate, it threatens the alliance's existence. Also, when Henry's new government role has him dive into the Russia issue, he turns to his former operative, Dmitri Petrov, for help, and as Nadine and Mike B's relationship heats up, Elizabeth finds out information about her old friend that makes her question his loyalty.

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