Fans of Doctor Who have been given a fresh trip through time, as the BBC has shared a new batch of behind-the-scenes photos from one of the revived series' most beloved episodes.The official Doctor Who accounts across social media marked 20 years since The Girl in the Fireplace was first aired, posting a set of production images from the David Tennant-era classic.The post reads: "20 years since the debut of THE GIRL IN THE FIREPLACE, here's some…