2003 (releases)

January

 * January - AUDIO: Dalek War: Chapter One was first released.
 * January - First issue of Miranda was published.
 * 6 January - Fear of the Dark was first published.
 * 9 January - DWM 326 was released featuring an exclusive CD AUDIO: No Place Like Home.
 * 31 January - Rip Tide was first published.

February

 * February - AUDIO: Dalek War: Chapter Two was first released.
 * February - AUDIO: Nekromanteia was first released.
 * February - AUDIO: Sabbath Dei was released.
 * 3 February - Resurrection of the Daleks was released to DVD in Region 4.
 * 3 February - The Domino Effect was first published.
 * 4 February - AUDIO: Jubilee was first released.
 * 6 February - DWM 327 was released.
 * 17 February - The Seeds of Death was released to DVD in the UK.

March

 * March - AUDIO:  Taren Capel was first released.
 * 3 March - Blue Box was first published.
 * 3 March - The Space Pirates was released by BBC Audio.
 * 4 March - Vengeance on Varos and The Aztecs were released to DVD in Region 1.
 * 6 March - DWM 328 was released.
 * 28 March - AUDIO: The Dark Flame was first released.

April

 * April - AUDIO: Doctor Who and the Pirates was first released.
 * April - AUDIO: In the Year of the Cat was first released.
 * 2 April - Short Trips: Companions was first published.
 * 3 April - DWM 329 was released.
 * 7 April - Reckless Engineering was first published.
 * 20 April - REF: The Nth Doctor, 2nd edition, was published.
 * 23 April - AUDIO: Dalek War: Chapter Three, AUDIO: Dalek War: Chapter Four, and The Mirror Effect were all first released.
 * 24 April - The Audio Scripts was released by Big Finish.
 * 24 April - Wonderland was first published.
 * 28 April - The Talons of Weng-Chiang was released to DVD in the UK.

May

 * May - The second issue of the comic book series Miranda was published.
 * 1 May - DWM 330 was released.
 * 2 May - The BBC's website launched a six-part webcast production of WC: Shada, remounting the TV story of the same title that was abandoned in 1979.
 * 5 May - The Seeds of Death was released to DVD in Region 4.
 * 5 May - Loving the Alien was first published.
 * 9 May - WC: Shada webcast Episode 2 was released.
 * 9 May - Auld Mortality was first released.
 * 16 May - WC: Shada webcast Episode 3 was released.
 * 19 May - Shell Shock was first published.
 * 23 May - WC: Shada webcast Episode 4 was released.
 * 24 May - AUDIO: Creatures of Beauty was first released.
 * 29 May - DWM 331 was released.
 * 30 May - WC: Shada webcast Episode 5 was released.

June

 * 2 June - PROSE: The Last Resort was first published.
 * 2 June - Music from the Seventh Doctor Audio Adventures was first released.
 * 6 June - WC: Shada webcast Episode 6 was released.
 * 9 June - The Dalek Invasion of Earth was released to DVD in the UK.
 * 15 June - AUDIO: The Bellotron Incident was first released.
 * 16 June - AUDIO: Sympathy for the Devil was first released and Short Trips: A Universe of Terrors was first published.
 * 23 June - AUDIO: Project: Lazarus was first released.
 * 26 June - DWM 332 was released.
 * 30 June - The Talons of Weng-Chiang was released to DVD in Region 4.

July

 * 2 July - Carnival of Monsters and Resurrection of the Daleks were released to DVD in Region 1.
 * 3 July - Short Trips: A Universe of Terrors was first published.
 * 7 July - The Colony of Lies was first published.
 * 7 July - The audio box set Yeti Attack was first released by BBC Audio.
 * 10 July - The novella The Cabinet of Light was first published by Telos Publishing.
 * 24 July - DWM 333 was released.

August

 * August - AUDIO: The Draconian Rage was first released.
 * August - COMIC: Political Animals was first released featuring This Town Will Never Let Us Go Prologue.
 * 1 August - AUDIO: Flip-Flop was first released.
 * 4 August - Timeless was first published.
 * 4 August - The audio box set Adventures in History was first released by BBC Audio.
 * 7 August - AUDIO: Full Fathom Five was first released.
 * 13 August - The Dalek Invasion of Earth was released to DVD in Region 4.
 * 14 August - Vengeance on Varos was released to DVD in Region 4.
 * 18 August - Earthshock was released to DVD in the UK.
 * 21 August - DWM 334 was released.
 * 27 August - AUDIO: Omega was first released.
 * 28 August - The Audio Scripts: Volume Two was released by Big Finish.

September

 * September - AUDIO: Davros was first released.
 * September - AUDIO: He Jests at Scars... was first released.
 * September - AUDIO: Checkmate was first released.
 * September - AUDIO: Deadline was first released.
 * September - PROSE: This town will never let us go was first released featuring a prologue.
 * 1 September - AUDIO: Doctor Who at the BBC was first released by BBC Audio.
 * 1 September - Wolfsbane was first published.
 * 3 September - PROSE: Life During Wartime was first published.
 * 8 September - The Two Doctors was released to DVD in the UK.
 * 18 September - DWM 335 was released.
 * 19 September - He Jests at Scars... was first released by Big Finish.
 * 25 September - Fallen Gods was first published.

October

 * October - COMIC: Bêtes Noires & Dark Horses was first released.
 * 1 October - Earthshock was released to DVD in Region 4.
 * 6 October - The Curse of Fenric was released to DVD in the UK.
 * 6 October - Emotional Chemistry was first published.
 * 7 October - The Talons of Weng-Chiang and The Dalek Invasion of Earth were released to DVD in Region 1.
 * 9 October - Short Trips: The Muses was first published.
 * 13 October - Life During Wartime was first published.
 * 16 October - DWM 336 was released.
 * 31 October - AUDIO: Master and The Wormery were first released.

November

 * 3 November - Deadly Reunion was first published.
 * 3 November - AUDIO: Exile was first released.
 * 3 November - Marco Polo was first released by BBC Audio.
 * 12 November - The Three Doctors was released to DVD in Region 4.
 * 13 November - The BBC website launched a new webcast serial, WC: Scream of the Shalka.
 * 13 November - DWM 337 was released featuring was released featuring an exclusive CD AUDIO: Living Legend.
 * 20 November - WC: Scream of the Shalka episode 2 was released.
 * 20 November - The Winning Side was first published, launching the Time Hunter series.
 * 20 November - The novella The Eye of the Tyger was first published by Telos Publishing.
 * 21 November -  Children in Need 2003 was first broadcast on BBC One as part of the Children in Need telethon.
 * 21 November - AUDIO: Zagreus and Shada were first released.
 * 22 November - The first part of Doctor Who @40 was first broadcast. Part One of K9 presents served as an introduction.
 * 23 November - The second part of Doctor Who @40 was first broadcast. Part Two of K9 presents served as an introduction.
 * 24 November - The Three Doctors was released to DVD in the UK.
 * 27 November - WC: Scream of the Shalka episode 3 was released.

December

 * December - REF: Howe's Transcendental Toybox, 2nd edition, was first published.
 * December - Short Trips: Steel Skies was first released.
 * December - AUDIO: Movers was first released.
 * 4 December - WC: Scream of the Shalka episode 4 was released.
 * 8 December - The audio box set Dalek was released by BBC Audio, containing audio recordings of The Power of the Daleks and The Evil of the Daleks.
 * 11 December - WC: Scream of the Shalka episode 5 was released.
 * 11 December - DWM 338 was released.
 * 14 December - AUDIO: Scherzo was first released.
 * 18 December - WC: Scream of the Shalka episode 6 was released.
 * 18 December - The novella Companion Piece was first published by Telos Publishing.
 * 30 December - The Story of Doctor Who was first broadcast.

Unknown dates

 * Unknown - The original Llangollen Doctor Who Experience, in North Wales, closed.