December 25th [Christmas Day]: Today in WHO-story
Births
1916 - Edward Burnham (Professor Watkins in The Invasion and Professor Kettlewell in Robot)
1923 - Madalena Nicol (Nurse Pinto in The Faceless Ones)
1984 - Georgia Tennant (Jenny in The Doctor's Daughter and Big Finish Productions' audio adventures and Cassie Rise in the animated special Dreamland; Big Finish actress - Tanya Webster in Red Dawn, Alice in City of Spires, Tallow in Dark Eyes 3 and Avril Fenman in the Bernice Summerfield story New Frontiers; producer of The Five(ish) Doctors Reboot; daughter of Fifth Doctor actor Peter Davison and wife of Tenth Doctor actor David Tennant)
Deaths
1988 - Terence Dudley (director of Meglos and writer of Four to Doomsday, Black Orchid, The King's Demons and the one-off Doctor Who spin-off K9 & Company) aged 69
1999 - Peter Jeffrey (Pilot in The Macra Terror and Count Grendal in The Androids of Tara) aged 70
2003 - Art Wetherell (pencil artist for Doctor Who's comic strips originally published by Death's Head and The Incredible Hulk Presents) aged 42
2014 - Bernard Kay (Carl Tyler in The Dalek Invasion of Earth, Saladin in The Crusade, Inspector Crossland in The Faceless Ones, Caldwell in Colony in Space, Burns in the BBV audio The Choice and Major Dickens in the Big Finish audio Night Thoughts) aged 86; David Ryall (Sir Nikolas Valentine in the Big Finish audio Phantasmagoria) aged 79
2015 - Alan Mason (Corporal Nutting in Doctor Who and the Silurians) aged 84
2017 - Peter Fletcher (Doctor Who's boom operator)
Episodes
1965 - The Daleks' Master Plan, Episode Seven ('The Feast of Steven'): 7.9 million viewers
2005 - The Christmas Invasion: 9.84 million viewers
2006 - The Runaway Bride: 9.35 million viewers
2007 - Voyage of the Damned: 13.8 million viewers
2008 - The Next Doctor: 13.1 million viewers
2009 - The End of Time, Part One: 12.04 million viewers
2010 - A Christmas Carol: 12.11 million viewers
2011 - The Doctor, the Widow and the Wardrobe: 10.77 million viewers
2012 - The Snowmen: 9.87 million viewers
2013 - The Time of the Doctor; 11.14 million viewers; Strax Field Report: The Doctor Has Regenerated (online mini-episode)
2014 - Last Christmas: 8.28 million viewers
2015 - The Husbands of River Song: 7.69 million viewers
2016 - The Return of Doctor Mysterio: 7.83 million viewers
2017 - Twice Upon a Time: 7.92 million viewers
Introductions
2005 - David Tennant's full debut as the Tenth Doctor; first appearance of the Sycorax and the Roboforms
2006 - Catherine Tate's full debut as Donna Noble; Jacqueline King's debut as Sylvia Noble
2007 - Bernard Cribbins' debut as Wilfred Mott; Russell Tovey's debut as Midshipman Alonso Frame
2013 - First full glimpse of Peter Capaldi as the Twelfth Doctor
2015 - Matt Lucas' debut as Nardole
2017 - First full glimpse of Jodie Whittaker as the Thirteenth Doctor
Departures
2013 - Matt Smith's final regular appearance as the Eleventh Doctor
2017 - Peter Capaldi's final regular appearance as the Twelfth Doctor; final appearances to date for Pearl Mackie as Bill Potts, Matt Lucas as Nardole and Jenna Coleman as Clara Oswald
Documentaries
2007 - Doctor Who Confidential: Kylie Special (BBC Three)
2008 - Doctor Who Confidential: Confidential Christmas 2008 (BBC Three)
2009 - Doctor Who Confidential: Lords and Masters (BBC Three)
2010 - Doctor Who Confidential: Christmas Special 2010 (BBC Three); The Terry Nation Story (BBC Radio Wales)
2013 - Farewell to Matt Smith (BBC America)
Releases
2012 - Houdini and the Space Cuckoos, Part Four (online short story)
2014 - Toby Hadoke's Who's Round 100 (Big Finish)
2015 - The Diary of River Song: Series One (Big Finish)
2016 - The Diary of River Song: Series Two (Big Finish)
2017 - The First Doctor Adventures: Volume One (Big Finish)
Behind-the-Scenes
2007 - The BBC Children in Need concert Doctor Who: A Celebration was made available for a limited time on BBC iPlayer