Doctor Who is a British science fiction television programme produced by the BBC. The programme depicts the adventures of a mysterious, humanoid alien known as "the Doctor" who travels through time and space in his spacecraft, the TARDIS, which normally appears from the exterior to be a blue 1950s police box. With his companions, he explores time and space, faces a variety of foes and rights wrongs.

The programme is listed in Guinness World Records as the longest-running science fiction television show in the world, and as the "most successful" science fiction series of all time, in terms of its overall broadcast ratings, DVD and book sales, iTunes traffic and "illegal downloads." It has been recognised for its imaginative stories, creative low-budget special effects during its original run, and pioneering use of electronic music (originally produced by the BBC Radiophonic Workshop). The show is a significant part of British popular culture; in the United Kingdom and  elsewhere, it has become a cult television favourite and has influenced generations of British television professionals, many of whom grew up watching the series. It has received recognition from critics and the public as one of the finest British television programmes, including the BAFTA Award for Best Drama Series in 2006, and five consecutive wins at the National Television Awards since 2005, in the Drama category.

David Tennant (born David John McDonald on 18 April 1971 in Bathgate, West Lothian) is a Scottish actor. In addition to his work in the theatre (his Hamlet has been widely praised, Tennant is best known for his television roles as the tenth incarnation of the Doctor in Doctor Who, as well as the title role in Casanova. In cinema, he is best known as Barty Crouch, Jr. in Harry Potter and the Goblet of Fire..

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