Nelson Van Alden is a fictional character from the television series Boardwalk Empire, which is set during the Prohibition era in the United States. He serves as a federal agent tasked with enforcing the laws against alcohol production and distribution. Van Alden is portrayed as a strict and morally rigid individual, often struggling with the corrupt environment around him. Throughout the series, Van Alden's character experiences significant personal and professional challenges. His dedication to his job often puts him at odds with the criminal elements of Atlantic City, including characters like Nucky Thompson. This conflict drives much of his character development and the show's narrative.