The Emmy and Tony-nominated character actor reflects on his decades of struggle prior to landing 'Stranger Things,' and the toll that both anonymity and fame took on his mental health; why, for his first post-'Stranger Things' project, he was drawn to producing and starring in an HBO limited series that raises questions about present-day masculinity, for which he is now a double Emmy nominee; and what's next for him, including a reunion with his 'Stranger Things' costar Millie Bobby Brown.

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