The world’s longest-running science-fiction TV series, Doctor Who has naturally changed a lot over the decades. Regeneration is the secret to Doctor Who‘s success, because it allows for the lead to be recast seamlessly, with each regeneration – or “renewal” as the first such event was called – serving as the perfect opportunity for a […] The post 63 Years Ago Today, Doctor Who Lost Its First Companion With a Promise That Still Hasn’t Been Fulfilled appeared first on ComicBook.com .