The 654th episode of Doctor Who airs on BBC1. Lynda Bellingham, Michael Jayston and Honor Blackman guest star; Anthony Ainley appears as the Master. This is Robert Holmes’ final Doctor Who script completed before his death, and the last episode of the season must be completed by other writers under trying circumstances, including the controversial sudden exit of current script editor Eric Saward. 
The 655th episode of Doctor Who airs on BBC1. Lynda Bellingham, Michael Jayston and Honor Blackman guest star; Anthony Ainley appears as the Master. Though no one realizes it at the time of production, this is Colin Baker’s final appearance as the sixth Doctor before the BBC replaces him in the role. It’s also the final Time Lord story until well into the new series of the 21st century. The 23rd season of Doctor Who, and the trial storyline, concludes with this episode.
This timeline entry leads to an entry covering this entire Doctor Who serial; there are plans to write new episodic entries in the future. You can support this effort!
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The Doctor Who adventure Dimensions In Time airs in two parts as part of the BBC’s Red Nose Day telethon, introduced by Noel Edmonds and featuring all five living Doctors and many of the surviving companions. Bizarrely, this story is also a crossover with the BBC’s primetime soap EastEnders, so many of that show’s cast appear as well, and it’s the closest the BBC gets to celebrating Doctor Who’s 30th anniversary.
Big Finish Productions releases the first Doctor Who audio drama in its main monthly range (though the range is not yet monthly, a frequency that will be determined by sheer audience demand). Peter Davison, Colin Baker, and Sylvester McCoy reprise their respective versions of the Doctor in a story written, directed and scored by Nicholas Briggs.
Big Finish Productions releases the third Doctor Who audio drama in its main monthly range, starring Colin Baker and Nicola Bryant. Peter Miles guest stars.
Big Finish Productions releases the sixth Doctor Who audio drama in its main monthly range, starring Colin Baker and introducing Maggie Stables as the first original-to-audio companion in Big Finish’s Doctor Who range, history professor Dr. Evelyn Smythe.
Big Finish Productions releases the ninth Doctor Who audio drama in its main monthly range, starring Colin Baker and Maggie Stables. Nicholas Courtney reprises his role as the Brigadier, finally giving the sixth Doctor a full-length adventure alongside the beloved character.
Big Finish Productions releases the 11th Doctor Who audio drama in its main monthly range, starring Colin Baker and Maggie Stables, with Lalla Ward reprising her role of Romana from Tom Baker’s era of the TV series.
Big Finish Productions releases the 14th Doctor Who audio drama in its main monthly range, starring Colin Baker with Robert Jezek as Frobisher, a character originated in Doctor Who Magazine’s comics.
Big Finish Productions releases the 22nd Doctor Who audio drama in its main monthly range, starring Colin Baker and Maggie Stables.
Big Finish Productions releases the 23rd Doctor Who audio drama in its main monthly range, starring Colin Baker and Maggie Stables.
Big Finish Productions releases the 27th Doctor Who audio drama in its main monthly range, starring Colin Baker and Bonnie Langford. Matt Lucas guest stars in the first Doctor Who audio “Christmas special” from Big Finish – not so much holiday-themed as more light-hearted than the usual fare.
Big Finish releases a free CD with a stand-alone Doctor Who audio story starring Colin Baker, attached to the cover of Doctor Who Magazine issue #313.
Big Finish Productions releases the second Doctor Who: Excelis audio drama, a limited series of interconnected stories spanning several of the Doctor’s regenerations. Colin Baker and Anthony Stewart Head (Buffy: The Vampire Slayer) star.
Big Finish Productions releases a bonus Doctor Who audio drama starring Colin Baker. (This title was initially exclusive to Big Finish’s subscription program, as an incentive for those whose subscriptions included Neverland.)
Big Finish Productions releases the 35th Doctor Who audio drama in its main monthly range, starring Colin Baker and Nicola Bryant.
Big Finish Productions releases the 37th Doctor Who audio drama in its main monthly range, starring Colin Baker and Maggie Stables. Anneke Wills guest stars.
Big Finish Productions releases the one-off audio drama Doctor Who: Real Time, which premiered on the BBCi website as an audio series with limited Flash animation. Colin Baker, Maggie Stables, and Yee Jee Tso star.
Big Finish Productions releases the 40th Doctor Who audio drama in its main monthly range, starring Colin Baker and Maggie Stables. Martin Jarvis guest stars.
Big Finish Productions releases the 43rd Doctor Who audio drama in its main monthly range, starring Colin Baker and Maggie Stables. Bill Oddie guest stars in a very musical audio drama.
Big Finish Productions releases the 45th Doctor Who audio drama in its main monthly range, starring Colin Baker, Maggie Stables, and Sylvester McCoy.
Big Finish Productions releases the 48th Doctor Who audio drama in its main monthly range, starring Colin Baker and Wendy Padbury.
Big Finish Productions releases the 50th Doctor Who audio drama in its main monthly range, starring Peter Davison, Colin Baker, Sylvester McCoy, and Paul McGann. This story, which unites many past stars of TV Doctor Who in unusual roles, celebrates 40 years of Doctor Who.
Big Finish Productions releases the 51st Doctor Who audio drama in its main monthly range, starring Colin Baker and Katy Manning.
Big Finish Productions releases the 57th Doctor Who audio drama in its main monthly range, starring Colin Baker and Maggie Stables.
Big Finish Productions releases the 60th Doctor Who audio drama in its main monthly range, starring Colin Baker and Maggie Stables.
Big Finish Productions releases a bonus Doctor Who audio drama starring Colin Baker. (This title was initially exclusive to Big Finish’s subscription program, as an incentive for those whose subscriptions included The Next Life.)
Big Finish Productions releases the 65th Doctor Who audio drama in its main monthly range, starring Colin Baker and Bonnie Langford.
Big Finish Productions releases the 68th Doctor Who audio drama in its main monthly range, starring Colin Baker and Bonnie Langford.
Big Finish Productions releases the 73rd Doctor Who audio drama in its main monthly range, starring Colin Baker, Bonnie Langford, and Maggie Stables.