'There is still so much story to tell,' 'This Is Us' exclusive look

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"There is still so much story to tell," said Mandy Moore about the new season of the Emmy- nominated show "This Is Us."

In this exclusive first look from NBC, Milo Ventimiglia, Mandy Moore, Chrissy Metz, Justin Hartley, Sterling Brown and Chris Sullivan touch on season 4 and the moments we won't expect.