War and Peace
Season 1, Episode 4: Part 4
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As Moscow is set ablaze by the retreating Russians, the Rostovs flee their estate, taking wounded soldiers with them, and unbeknownst to them, also Andrei. Pierre, dressed as a peasant, tries to assassinate Napoleon but is taken prisoner. As the French are forced to retreat, he's marched for months with the Grande Armée, until being freed by a raiding party.