Doctor Who is a long-running, award-winning British science fiction television programme produced by the BBC. The programme depicts the adventures of a mysterious alien time-traveller known as “the Doctor” who travels in his space and time-ship, the TARDIS, which appears from the exterior to be a blue police phone box. With his companions, he explores time and space, solving problems and righting wrongs.
The show’s lead character is currently portrayed by David Tennant. A Christmas special co-starring Kylie Minogue aired in December 2007, and the fourth series started on 5 April 2008. For that series, Catherine Tate will reprise her role of Donna Noble, from the 2006 Christmas special, as the Doctor’s latest companion. Midway through the series, Freema Agyeman will also return to her role of Martha Jones, following a multi-episode guest appearance in the Doctor Who spin-off series, Torchwood. John Barrowman will continue his role as Captain Jack Harkness, and Billie Piper will return as Rose Tyler for three episodes. Elisabeth Sladen is also set to return as Sarah Jane Smith in a cameo role.
After a 2008 Christmas special and three further specials starring David Tennant, scheduled to air in 2009, Doctor Who is planned to return in 2010 for a fifth full length series.
Warning: spoilers ahead.