From the onset of "Peaky Blinders," we're shown how Cillian Murphy's Tommy is grappling with his deteriorating mental state, stemming from his struggles with post-traumatic stress disorder since his return from his time serving in the war. Throughout the series, we watch as Tommy's mental health turns for the worse, gets better, and worsens again. His inner turmoil from fighting in the First World War never ceases to exist; it overwhelms him repeatedly and threatens to seep into and impact...

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