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Beyond the nostalgic allure of seeing beloved original actors, Gollum's complexity adds depth to the narrative. He is not merely a side character but has connections to many key figures of the Third Age, including Sauron and the monstrous Shelob. Many viewers may find it hard to believe that a movie centered on a "secondary" character could be engaging. However, Gollum's duality, characterized by his use of plural forms when referring to himself, illustrates a deeply conflicted personality that lends itself to a richer exploration of themes.