1968 (releases)

January

 * 6 January - Episode 3 of The Enemy of the World debuted on BBC1.
 * 6 January - The second part of The Witches was first published in TV Comic.
 * 13 January - Episode 4 of The Enemy of the World debuted on BBC1.
 * 13 January - The third part of The Witches was first published in TV Comic.
 * 20 January - Episode 5 of The Enemy of the World debuted on BBC1.
 * 20 January - The fourth part of The Witches was first published in TV Comic.
 * 27 January - Episode 6 of The Enemy of the World debuted on BBC1. The episode was followed by a specially shot scene of the Second Doctor on the London Underground tunnel/platform set addressing the viewers about the events of the next story, The Web of Fear.
 * 27 January - The fifth and final part of The Witches was first published in TV Comic.

February

 * 3 February - Episode 1 of The Web of Fear debuted on BBC1.
 * 3 February - The first part of Cyber-Mole was first published in TV Comic.
 * 10 February - Episode 2 of The Web of Fear debuted on BBC1.
 * 10 February - The second part of Cyber-Mole was first published in TV Comic.
 * 17 February - Episode 3 of The Web of Fear debuted on BBC1.
 * 17 February - The third part of Cyber-Mole was first published in TV Comic.
 * 24 February - Episode 4 of The Web of Fear debuted on BBC1.
 * 24 February - The fourth and final part of Cyber-Mole was first published in TV Comic.

March

 * 2 March - Episode 5 of The Web of Fear debuted on BBC1.
 * 2 March - The first part of The Sabre-Toothed Gorillas was first published in TV Comic.
 * 9 March - Episode 6 of The Web of Fear debuted on BBC1.
 * 9 March - The second part of The Sabre-Toothed Gorillas was first published in TV Comic.
 * 16 March - Episode 1 of Fury from the Deep debuted on BBC1.
 * 16 March - The third part of The Sabre-Toothed Gorillas was first published in TV Comic.
 * 23 March - Episode 2 of Fury from the Deep debuted on BBC1.
 * 23 March - The fourth and final part of The Sabre-Toothed Gorillas was first published in TV Comic.
 * 30 March - Episode 3 of Fury from the Deep debuted on BBC1.
 * 30 March - The first part of The Cyber Empire was first published in TV Comic.

April

 * 6 April - Episode 4 of Fury from the Deep debuted on BBC1.
 * 6 April - The second part of The Cyber Empire was first published in TV Comic.
 * 13 April - Episode 5 of Fury from the Deep debuted on BBC1.
 * 13 April - The third part of The Cyber Empire was first published in TV Comic.
 * 20 April - Episode 6 of Fury from the Deep debuted on BBC1.
 * 20 April - The fourth and final part of The Cyber Empire was first published in TV Comic.
 * 27 April - Episode 1 of The Wheel in Space debuted on BBC1.
 * 27 April - The first part of The Dyrons was first published in TV Comic.

May

 * 4 May - Episode 2 of The Wheel in Space debuted on BBC1.
 * 4 May - The second part of The Dyrons was first published in TV Comic.
 * 11 May - Episode 3 of The Wheel in Space debuted on BBC1.
 * 11 May - The third part of The Dyrons was first published in TV Comic.
 * 18 May - Episode 4 of The Wheel in Space debuted on BBC1.
 * 18 May - The fourth part of The Dyrons was first published in TV Comic.
 * 25 May - Episode 5 of The Wheel in Space debuted on BBC1.
 * 25 May - The fifth and final part of The Dyrons was first published in TV Comic.

June

 * 1 June - Episode 6 of The Wheel in Space debuted on BBC1.
 * 1 June - The first part of Dr. Who and the Space Pirates was first published in TV Comic.
 * 8 June - The second part of Dr. Who and the Space Pirates was first published in TV Comic.
 * 15 June - The third part of Dr. Who and the Space Pirates was first published in TV Comic.
 * 22 June - The fourth part of Dr. Who and the Space Pirates was first published in TV Comic.
 * 29 June - The fifth and final part of Dr. Who and the Space Pirates was first published in TV Comic.

July

 * 6 July - The first part of Car of the Century was first published in TV Comic.
 * 13 July - The second part of Car of the Century was first published in TV Comic.
 * 20 July - The third part of Car of the Century was first published in TV Comic.
 * 27 July - The fourth and final part of Car of the Century was first published in TV Comic.

August

 * 3 August - The first part of The Jokers was first published in TV Comic.
 * 10 August - Episode 1 of The Dominators debuted on BBC1, launching Season 6.
 * 10 August - The second part of The Jokers was first published in TV Comic.
 * 17 August - Episode 2 of The Dominators debuted on BBC1.
 * 17 August - The third part of The Jokers was first published in TV Comic,
 * 24 August - Episode 3 of The Dominators debuted on BBC1.
 * 24 August - The fourth and final part of The Jokers was first published in TV Comic.
 * 31 August - Episode 4 of The Dominators debuted on BBC1.
 * 31 August - The first part of Invasion of the Quarks was first published in TV Comic.

September

 * September - The fourth Doctor Who Annual was published.
 * 7 September - Episode 5 of The Dominators debuted on BBC1.
 * 7 September - The second part of Invasion of the Quarks was first published in TV Comic.
 * 14 September - Episode 1 of The Mind Robber debuted on BBC1.
 * 14 September - The third part of Invasion of the Quarks was first published in TV Comic.
 * 21 September - Episode 2 of The Mind Robber debuted on BBC1.
 * 21 September - The fourth part of Invasion of the Quarks was first published in TV Comic.
 * 28 September - Episode 3 of The Mind Robber debuted on BBC1.
 * 28 September - The fifth and final part of Invasion of the Quarks was first published in TV Comic.

October

 * 5 October - Episode 4 of The Mind Robber debuted on BBC1.
 * 5 October - The first part of The Killer Wasps was first published by TV Comic.
 * 12 October - Episode 5 of The Mind Robber debuted on BBC1.
 * 12 October - The second part of The Killer Wasps was first published by TV Comic.
 * 19 October - The third part of The Killer Wasps was first published by TV Comic.
 * 26 October - The fourth and final part of The Killer Wasps was first published by TV Comic.

November

 * 2 November - Episode 1 of The Invasion debuted on BBC1.
 * 2 November - The first part of Ice Cap Terror was first published by TV Comic.
 * 9 November - Episode 2 of The Invasion debuted on BBC1.
 * 9 November - The second part of Ice Cap Terror was first published by TV Comic.
 * 16 November - Episode 3 of The Invasion debuted on BBC1.
 * 16 November - The third part of Ice Cap Terror was first published by TV Comic.
 * 23 November - Episode 4 of The Invasion debuted on BBC1.
 * 23 November - The fourth and final part of Ice Cap Terror was first published by TV Comic.
 * 30 November - Episode 5 The Invasion debuted on BBC1.
 * 30 November - The first part of Jungle of Doom was first published by TV Comic.

December

 * 7 December - Episode 6 of The Invasion debuted on BBC1.
 * 7 December - The second part of Jungle of Doom was first published by TV Comic.
 * 14 December - Episode 7 of The Invasion debuted on BBC1.
 * 14 December - The third part of Jungle of Doom was first published by TV Comic.
 * 21 December - Episode 8 of The Invasion debuted on BBC1.
 * 21 December - The fourth part of Jungle of Doom was first published by TV Comic.
 * 28 December - Episode 1 of The Krotons debuted on BBC1.
 * 28 December - The fifth and final part of Jungle of Doom was first published by TV Comic,

Unknown dates

 * Frazer Hines released the pop single "Who's Dr. Who?" on Major Minor Records.
 * The TV Comic Holiday Special 1968, featuring the stories Masquerade and Return of the Witches, was released.
 * TV Comic Annual 1968, featuring the stories Pursued by the Trods and Attack of the Daleks, was released.