Worlds Enough and Time

Worlds Enough and Time was a tertiary celebration of Doctor Who's 50th Anniversary, after Steven Moffat's episode and An Adventure in Space and Time by Mark Gatiss. The episode was, like the other celebrations, simulcast in Britain, the US, Canada, Australia, New Zealand, and several other countries, but to Britain it was on the 22nd of November. Steven Moffat and Brian Minchin were executive producers, and the episode was written by Nicholas Briggs.

Rowan Atkinson, Benedict Cumberbatch, Idris Elba, and Chris Jury played alternate versions of the Doctor, Tom Baker, Peter Davison, Colin Baker, Sylvester McCoy, Paul McGann, David Tennant, and Matt Smith reprised their versions of the character, and Carol Anne Ford, William Russell, Frasier Hines, Wendy Padbury, Katy Manning, Lalla Ward, Janet Fielding, Sarah Sutton, Nicola Bryant, Sophie Aldred, India Fisher, Billie Piper, John Barrowman, Catherine Tate, Freema Agyeman, and Jenna Coleman all had roles of varying importance in the episode. The rest of the cast included Timothy Dalton, John Simm, Andrew Scott, Ruth Wilson, and Claudia Black.

The plot saw members of The Deca collect The Doctors together into one place and try to kill them, using their companions as a threat. In the weeks prior to the broadcast, 11 Prequels were available via BBC Red Button, featuring David Bradley, Rowan Atkinson, and Tom Baker through to Matt Smith.