1968 (releases)


 * 6 January - The Enemy of the World Episode 3 was first broadcast.
 * 13 January - The Enemy of the World Episode 4 was first broadcast.
 * 20 January - The Enemy of the World Episode 5 was first broadcast.
 * 27 January - The Enemy of the World Episode 6 was first broadcast. The episode was followed by a specially shot scene of the Second Doctor on the London Underground set addressing the viewers about the events of the next story, The Web of Fear.
 * 1 February - Tom Baker made his TV acting debut in an episode of Market in Honey Lane.
 * 3 February - The Web of Fear Episode 1 was first broadcast.
 * 10 February - The Web of Fear Episode 2 was first broadcast.
 * 17 February - The Web of Fear Episode 3 was first broadcast. This was the first appearance of Nicholas Courtney as Col. (later Brigadier) Alistair Gordon Lethbridge-Stewart, a character that became a regular part of the Doctor Who universe for the next forty years.
 * 24 February - The Web of Fear Episode 4 was first broadcast.
 * 25 February - Actor Mark Griffin was born.
 * 2 March - The Web of Fear Episode 5 was first broadcast.
 * 3 March - Scientist Brian Cox was born.
 * 9 March - The Web of Fear Episode 6 was first broadcast.
 * 16 March - Fury from the Deep Episode 1 was first broadcast.
 * 23 March - Fury from the Deep Episode 2 was first broadcast.
 * 30 March - Fury from the Deep Episode 3 was first broadcast.
 * 4 April - was assassinated.
 * 5 April - Actor Stewart Lee was born.
 * 6 April - Fury from the Deep Episode 4 was first broadcast.
 * 6 - Actor Keith Pyott died.
 * 13 April - Fury from the Deep Episode 5 was first broadcast.
 * 20 April - Fury from the Deep Episode 6 was first broadcast. Deborah Watling left the series with this episode.
 * 23 April - Actor Ricky Groves was born.
 * 27 April - The Wheel in Space Episode 1 was first broadcast.
 * 4 May - The Wheel in Space Episode 2 was first broadcast. This was the debut of Wendy Padbury as new companion Zoe Heriot.
 * 11 May - The Wheel in Space Episode 3 was first broadcast.
 * 12 May - Actor Catherine Tate was born.
 * 18 May - The Wheel in Space Episode 4 was first broadcast.
 * 25 May - The Wheel in Space Episode 5 was first broadcast.
 * 28 May - Actor Kylie Minogue was born.
 * 1 June - The Wheel in Space Episode 6 was first broadcast, concluding the fifth season of Doctor Who. The episode ended with the Second Doctor showing Zoe a recording of a recent adventure, leading into a rebroadcast of The Evil of the Daleks which filled the gap before the start of the next season.
 * 2 June - Actor Jon Culshaw was born.
 * 6 June - was assassinated.
 * 7 June - Actor Sarah Parish was born.
 * 28 June - Actor Adam Woodyatt was born.
 * 12 July - Actor Sara Griffiths was born.
 * 5 August - Writer Matt Jones was born.
 * 9 August - Producer Sanne Wohlenberg was born.
 * 10 August - The Dominators Episode 1 was first broadcast, launching Season 6.
 * 11 August - Actor Gray O'Brien was born.
 * 17 August - The Dominators Episode 2 was first broadcast.
 * 17 - Actor Helen McCrory was born.
 * 20 August - Actor Matthew Chambers was born.
 * 24 August - The Dominators Episode 3 was first broadcast.
 * 31 August - The Dominators Episode 4 was first broadcast.
 * The fourth Doctor Who Annual was published.
 * 7 September - The Dominators Episode 5 was first broadcast.
 * 8 September - Actor Louise Minchin was born.
 * 9 September - Actor Julia Sawalha was born.
 * 14 September - The Mind Robber Episode 1 was first broadcast.
 * 21 September - The Mind Robber Episode 2 was first broadcast.
 * 28 September - The Mind Robber Episode 3 was first broadcast.
 * Frazer Hines released the pop single "Who's Dr. Who?" on Major Minor Records.
 * 5 October - The Mind Robber Episode 4 was first broadcast.
 * 9 October - Actor James Dreyfus was born.
 * 12 October - The Mind Robber Episode 5 was first broadcast, followed by several weeks of preemptions caused by coverage of the 1968 Summer Olympic Games in Mexico City.
 * 12 - Actor Mark Donovan was born.
 * 2 November - The Invasion Episode 1 was first broadcast. Terrance Dicks' long association with the Doctor Who franchise began with this episode, on which he served as script editor. Although the character was not yet identified by name, John Levene made his debut as John Benton.
 * 9 November - The Invasion Episode 2 was first broadcast, in which UNIT was officially introduced. Alistair Gordon Lethbridge-Stewart appeared as a brigadier for the first time, though he did not become a regular until 1970.
 * 16 November - The Invasion Episode 3 was first broadcast.
 * 19 November - Actor Mark Bonnar was born.
 * 23 November - The Invasion Episode 4 was first broadcast. This was the show's fifth anniversary.
 * 30 November - The Invasion Episode 5 was first broadcast.
 * 7 December - The Invasion Episode 6 was first broadcast.
 * 14 December - The Invasion Episode 7 was first broadcast.
 * 18 December - Actor Nina Wadia was born.
 * 21 December - The Invasion Episode 8 was first broadcast. Except for minor references, this was the last appearance of the Cybermen until Revenge of the Cybermen in 1975.
 * 21 - Actor Catherine Cusack was born.
 * 28 December - The Krotons Episode 1 was first broadcast. This was the first Doctor Who script for the prolific Robert Holmes.
 * 31 December - Writer David A. McIntee was born.