The Doctor Who Production Diary: 1986

January
16 Colin Baker is contracted for Season Twenty-Three, with an option for one additional year The Sixth Doctor
20 The United Kingdom and France announce plans to construct a rail tunnel under the English Channel
23 Bonnie Langford is announced as new companion Melanie Bush Melanie Bush
28 On its tenth mission, the space shuttle Challenger disintegrates seventy-three seconds after lift-off, killing all seven astronauts on board including schoolteacher Christa McAuliffe

February
2 Christopher H Bidmead's “Pinacotheca” is abandoned The Sixth Doctor
4 Robert Holmes is commissioned to write The Trial Of A Time Lord (Segment Four) The Trial Of 
A Time Lord (Segment Four)
10 PJ Hammond is commissioned to write “Paradise Five” The Sixth Doctor
19 The Mir space station is launched into orbit by the USSR
24 BBC Head of Series and Serials Jonathan Powell delivers a stinging criticism of the scripts for The Trial Of A Time Lord (Segment One), exacerbating tensions between John Nathan-Turner and Eric Saward The Trial Of A Time Lord (Segment
One)
late
Feb
PJ Hammond's “Paradise Five” is abandoned The Sixth Doctor

March
6 Pip and Jane Baker are commissioned to provide a storyline for The Trial Of A Time Lord (Segment Three) The Trial Of 
A Time Lord (Segment Three)
13 Pip and Jane Baker are commissioned to write The Trial Of A Time Lord (Segment Three) The Trial Of 
A Time Lord (Segment Three)

April
1 Anthony Ainley is contracted for The Trial Of A Time Lord (Segment Four) The
Master
8 Location filming for The Trial Of A Time Lord (Segment One) takes place in Horndean, Hampshire The Trial Of A Time Lord (Segment
One)
9 Location filming for The Trial Of A Time Lord (Segment One) takes place in Horndean, Hampshire The Trial Of A Time Lord (Segment
One)
10 Location filming for The Trial Of A Time Lord (Segment One) takes place in East Meon, Hampshire The Trial Of A Time Lord (Segment
One)
11 Location filming for The Trial Of A Time Lord (Segment One) takes place in East Meon, Hampshire The Trial Of A Time Lord (Segment
One)
13 Eric Saward resigns as script editor of Doctor Who The Sixth Doctor
24 Recording for The Trial Of A Time Lord (Segment One) takes place in BBC Television Centre Studio 6 The Trial Of A Time Lord (Segment
One)
25 Recording for The Trial Of A Time Lord (Segment One) takes place in BBC Television Centre Studio 6 The Trial Of A Time Lord (Segment
One)
26 An explosion at the Chernobyl Nuclear Power Plant in Ukraine forces the resettlement of hundreds of thousands of people due to radioactive fallout
27 Jenna Coleman (Clara Oswin Oswald) is born Clara Oswald

May
10 Recording for The Trial Of A Time Lord (Segment One) takes place in BBC Television Centre Studio 3 The Trial Of A Time Lord (Segment
One)
11 Recording for The Trial Of A Time Lord (Segment One) takes place in BBC Television Centre Studio 3 The Trial Of A Time Lord (Segment
One)
12 Recording for The Trial Of A Time Lord (Segment One) takes place in BBC Television Centre Studio 3 The Trial Of A Time Lord (Segment
One)
24 Robert Holmes passes away, leaving Eric Saward to complete the final episode of The Trial Of A Time Lord (Segment Four) The Trial Of 
A Time Lord (Segment Four)
27 Recording for The Trial Of A Time Lord (Segment Two) takes place in BBC Television Centre Studio 1 The Trial Of A Time Lord (Segment
Two)
28 Recording for The Trial Of A Time Lord (Segment Two) takes place in BBC Television Centre Studio 1 The Trial Of A Time Lord (Segment
Two)
29 Recording for The Trial Of A Time Lord (Segment Two) takes place in BBC Television Centre Studio 1 The Trial Of A Time Lord (Segment
Two)

June
4 Eric Saward withdraws permission for the use of his script for The Trial Of A Time Lord (Segment Four) episode fourteen The Trial Of
A Time Lord (Segment Four)
6 Pip and Jane Baker are commissioned to write a new version of The Trial Of A Time Lord (Segment Four) episode fourteen The Trial Of
A Time Lord (Segment Four)
11 Recording for The Trial Of A Time Lord (Segment Two) takes place in BBC Television Centre Studio 6 The Trial Of A Time Lord (Segment
Two)
12 Recording for The Trial Of A Time Lord (Segment Two) takes place in BBC Television Centre Studio 6 The Trial Of A Time Lord (Segment
Two)
13 Recording for The Trial Of A Time Lord (Segment One) takes place in BBC Television Centre Studio 6 The Trial Of A Time Lord (Segment
One)
13 Recording for The Trial Of A Time Lord (Segment Two) takes place in BBC Television Centre Studio 6 The Trial Of A Time Lord (Segment
Two)
15 Location filming for The Trial Of A Time Lord (Segment Two) takes place near Peacehaven, East Sussex The Trial Of A Time Lord (Segment
Two)
16 Location filming for The Trial Of A Time Lord (Segment Two) takes place near Peacehaven, East Sussex The Trial Of A Time Lord (Segment
Two)
23 Location filming for The Trial Of A Time Lord (Segment Four) takes place in Camber, East Sussex The Trial Of
A Time Lord (Segment Four)
24 Location filming for The Trial Of A Time Lord (Segment Four) takes place in Camber, East Sussex The Trial Of
A Time Lord (Segment Four)
30 Location filming for The Trial Of A Time Lord (Segment Four) takes place in Longton, Staffordshire The Trial Of
A Time Lord (Segment Four)

July
1 Location filming for The Trial Of A Time Lord (Segment Four) takes place in Longton, Staffordshire The Trial Of
A Time Lord (Segment Four)
2 Location filming for The Trial Of A Time Lord (Segment Four) takes place in Longton, Staffordshire The Trial Of
A Time Lord (Segment Four)
3 Location filming for The Trial Of A Time Lord (Segment Four) takes place in Longton, Staffordshire The Trial Of
A Time Lord (Segment Four)
16 Recording for The Trial Of A Time Lord (Segment Three) takes place in BBC Television Centre Studio 1 The Trial Of
A Time Lord (Segment Three)
16 Recording for The Trial Of A Time Lord (Segment Four) takes place in BBC Television Centre Studio 1 The Trial Of
A Time Lord (Segment Four)
17 Recording for The Trial Of A Time Lord (Segment Four) takes place in BBC Television Centre Studio 1 The Trial Of
A Time Lord (Segment Four)
23 Prince Andrew, the Duke of York, marries Sarah Ferguson at Westminster Abbey
30 Recording for The Trial Of A Time Lord (Segment Three) takes place in BBC Television Centre Studio 3 The Trial Of
A Time Lord (Segment Three)
31 Recording for The Trial Of A Time Lord (Segment Three) takes place in BBC Television Centre Studio 3 The Trial Of
A Time Lord (Segment Three)

August
1 Recording for The Trial Of A Time Lord (Segment Three) takes place in BBC Television Centre Studio 3 The Trial Of
A Time Lord (Segment Three)
12 Recording for The Trial Of A Time Lord (Segment Three) takes place in BBC Television Centre Studio 3 The Trial Of
A Time Lord (Segment Three)
13 In an interview published in Starburst magazine, Eric Saward publicly reveals his reasons for quitting as script editor of Doctor Who and harshly criticises John Nathan-Turner The Sixth Doctor
13 Recording for The Trial Of A Time Lord (Segment Three) takes place in BBC Television Centre Studio 3 The Trial Of
A Time Lord (Segment Three)
14 Recording for The Trial Of A Time Lord (Segment Three) takes place in BBC Television Centre Studio 3 The Trial Of
A Time Lord (Segment Three)
19 The BBC announces that Doctor Who will return for Season Twenty-Four The Seventh Doctor
20 The murder of fourteen coworkers by postal employee Patrick Sherrill in Edmond, Oklahoma inspires the phrase “going postal”

September
6 Debut broadcast of The Trial Of A Time Lord episode one on BBC1; Doctor Who returns to its original 25-minute format The Trial Of A Time Lord (Segment
One)
13 Debut broadcast of The Trial Of A Time Lord episode two on BBC1 The Trial Of A Time Lord (Segment
One)
20 Debut broadcast of The Trial Of A Time Lord episode three on BBC1 The Trial Of A Time Lord (Segment
One)
27 Debut broadcast of The Trial Of A Time Lord episode four on BBC1 The Trial Of A Time Lord (Segment
One)

October
4 Debut broadcast of The Trial Of A Time Lord episode five on BBC1 The Trial Of A Time Lord (Segment
Two)
6 At the invitation of BBC1 Controller Michael Grade, Sydney Newman submits a proposal to revamp Doctor Who; no further action is taken after a meeting between Newman and BBC Head of Series and Serials Jonathan Powell goes badly The Sixth Doctor
11 Debut broadcast of The Trial Of A Time Lord episode six on BBC1 The Trial Of A Time Lord (Segment
Two)
18 Debut broadcast of The Trial Of A Time Lord episode seven on BBC1 The Trial Of A Time Lord (Segment
Two)
25 Debut broadcast of The Trial Of A Time Lord episode eight on BBC1 The Trial Of A Time Lord (Segment
Two)
28 Ian Marter (Harry Sullivan) dies Harry
Sullivan
29 Colin Baker learns that the option on his contract for Season Twenty-Four will not be taken up, meaning that he has been fired from Doctor Who The Sixth Doctor

November
1 Debut broadcast of The Trial Of A Time Lord episode nine on BBC1 The Trial Of 
A Time Lord (Segment Three)
8 Debut broadcast of The Trial Of A Time Lord episode ten on BBC1 The Trial Of 
A Time Lord (Segment Three)
13 Bonnie Langford is contracted for Season Twenty-Four Melanie Bush
15 Debut broadcast of The Trial Of A Time Lord episode eleven on BBC1 The Trial Of 
A Time Lord (Segment Three)
22 Debut broadcast of The Trial Of A Time Lord episode twelve on BBC1 The Trial Of 
A Time Lord (Segment Three)
28 Contradicting an earlier promise, BBC Head of Series and Serials Jonathan Powell informs John Nathan-Turner that he will remain producer of Doctor Who for Season Twenty-Four The Seventh Doctor
29 Debut broadcast of The Trial Of A Time Lord episode thirteen on BBC1 The Trial Of 
A Time Lord (Segment Four)

December
6 Debut broadcast of The Trial Of A Time Lord episode fourteen on BBC1 The Trial Of 
A Time Lord (Segment Four)
13 The press reports that Colin Baker has been fired from Doctor Who The Sixth Doctor
mid
Dec
Colin Baker rejects the BBC's offer to return to Doctor Who for a final four-part story at the start of Season Twenty-Four The Sixth Doctor
18 The BBC confirms that Colin Baker will not be returning to Doctor Who for Season Twenty-Four The Sixth Doctor
22 Pip and Jane Baker are commissioned to write Time And The Rani Time And The Rani