Daniel John Hardcastle (born 23 March 1989), known online as Nerd³ or NerdCubed, is a British YouTuber, author and actor. Created in 2011, his YouTube channel primarily consists of video game-related content. As of December 2024, it has approximately 2.41 million subscribers and 1.35 billion video views. He is the author of The Sunday Times bestseller Fuck Yeah, Video Games: The Life and Extra Lives of a Professional Nerd, and The Paradox Paradox. In 2025 he became a writer for Doctor Who, writing an audio story in partnership with Big Finish Productions. Source: Wikipedia (en)