Doctor Who

Doctor Who is a British science fiction television franchise produced by the BBC since 1963, making it the longest-running science fiction series in history. The show follows the Doctor, a Time Lord from the planet Gallifrey who travels through time and space in the TARDIS, a time machine disguised as a British police box. The Doctor's ability to regenerate into a new form upon death has allowed 15 actors to portray the character across the classic series (1963-1989), TV movie (1996), and revived series (2005-present). Themes include pacifism, the value of human life, the power of compassion over violence, and the importance of standing against injustice. The franchise has expanded into novels, audio dramas, comics, and spin-offs like Torchwood and The Sarah Jane Adventures.