The Doctor Who Production Diary: 1966

January
1 Debut broadcast of The Daleks' Master Plan episode eight, Volcano, on BBC1 The Daleks' Master Plan
3 Filming for The Massacre Of St Bartholomew's Eve takes place at the Ealing Television Film Studios The Massacre Of St Bartholomew's 
Eve
4 Filming for The Massacre Of St Bartholomew's Eve takes place at the Ealing Television Film Studios The Massacre Of St Bartholomew's 
Eve
5 Filming for The Massacre Of St Bartholomew's Eve takes place at the Ealing Television Film Studios The Massacre Of St Bartholomew's 
Eve
6 Filming for The Massacre Of St Bartholomew's Eve takes place at the Ealing Television Film Studios The Massacre Of St Bartholomew's 
Eve
7 Recording for The Daleks' Master Plan takes place at BBC Television Centre Studio 3 The Daleks' Master Plan
7 Location filming for The Massacre Of St Bartholomew's Eve takes place in London; Jackie Lane joins the regular Doctor Who cast The Massacre Of St Bartholomew's 
Eve
8 Debut broadcast of The Daleks' Master Plan episode nine, Golden Death, on BBC1 The Daleks' Master Plan
14 Recording for The Daleks' Master Plan takes place at BBC Television Centre Studio 3; Jean Marsh leaves Doctor Who The Daleks' Master Plan
15 Debut broadcast of The Daleks' Master Plan episode ten, Escape Switch, on BBC1 The Daleks' Master Plan
mid
Jan
Innes Lloyd and Gerry Davis are appointed as producer and script editor of Doctor Who, respectively, replacing John Wiles and Donald Tosh; Davis begins work almost immediately The First Doctor
17 Brian Hayles' “The Hands Of Aten” and “The White Witch” are abandoned, while David Whitaker's “The New Armada” is rejected The First Doctor
19 Ian Stuart Black is commissioned to write The Savages The Savages
21 Recording for The Massacre Of St Bartholomew's Eve takes place at Riverside Studio 1 The Massacre Of St Bartholomew's 
Eve
22 Debut broadcast of The Daleks' Master Plan episode eleven, The Abandoned Planet, on BBC1 The Daleks' Master Plan
24 Filming for The Ark takes place at the Ealing Television Film Studios The Ark
28 Recording for The Massacre Of St Bartholomew's Eve takes place at Riverside Studio 1; William Hartnell is absent while on holiday The Massacre Of St Bartholomew's 
Eve
29 Debut broadcast of The Daleks' Master Plan episode eight, Volcano, on BBC1 The Daleks' Master Plan
31 Filming for The Ark takes place at the Ealing Television Film Studios The Ark

February
early
Feb
Innes Lloyd begins trailing John Wiles in preparation for becoming Doctor Who's producer The First Doctor
1 Filming for The Ark takes place at the Ealing Television Film Studios The Ark
2 Filming for The Ark takes place at the Ealing Television Film Studios The Ark
3 Filming for The Ark takes place at the Ealing Television Film Studios The Ark
4 Recording for The Massacre Of St Bartholomew's Eve takes place at Riverside Studio 1 The Massacre Of St Bartholomew's 
Eve
5 Debut broadcast of The Massacre Of St Bartholomew's Eve episode one, War Of God, on BBC1 The Massacre Of St Bartholomew's 
Eve
11 Recording for The Massacre Of St Bartholomew's Eve takes place at Riverside Studio 1 The Massacre Of St Bartholomew's 
Eve
12 Debut broadcast of The Massacre Of St Bartholomew's Eve episode two, The Sea Beggar, on BBC1 The Massacre Of St Bartholomew's 
Eve
15 William Hartnell's contract is extended to include the remaining episodes of Doctor Who's third production block The First Doctor
18 Recording for The Ark takes place at Riverside Studio 1 The Ark
19 Debut broadcast of The Massacre Of St Bartholomew's Eve episode three, Priest Of Death, on BBC1 The Massacre Of St Bartholomew's 
Eve
24 Peter Purves' contract is extended for twelve episodes beyond The Ark, with the understanding that Purves will then be leaving Doctor Who Steven 
Taylor
25 Recording for The Ark takes place at Riverside Studio 1 The Ark
26 Debut broadcast of The Massacre Of St Bartholomew's Eve episode four, Bell Of Doom, on BBC1 The Massacre Of St Bartholomew's 
Eve
late
Feb
Innes Lloyd officially succeeds John Wiles as the producer of Doctor Who The First Doctor

March
2 Filming for The Celestial Toymaker takes place at the Ealing Television Film Studios The Celestial Toymaker
3 Filming for The Celestial Toymaker takes place at the Ealing Television Film Studios The Celestial Toymaker
4 Recording for The Ark takes place at Riverside Studio 1 The Ark
5 Debut broadcast of The Ark episode one, The Steel Sky, on BBC1 The Ark
8 Brian Hayles is commissioned to write “The Nazis” The First Doctor
11 Recording for The Ark takes place at Riverside Studio 1 The Ark
12 Debut broadcast of The Ark episode two, The Plague, on BBC1 The Ark
15 Ian Stuart Black is commissioned to write The War Machines, based on a partial script by Pat Dunlop and an idea suggested by Doctor Who's new scientific consultant, Dr Kit Pedler The War Machines
18 Recording for The Celestial Toymaker takes place at Riverside Studio 1 The Celestial Toymaker
19 Debut broadcast of The Ark episode three, The Return, on BBC1 The Ark
25 Recording for The Celestial Toymaker takes place at Riverside Studio 1; William Hartnell is absent while on holiday The Celestial Toymaker
26 Debut broadcast of The Ark episode four, The Bomb, on BBC1 The Ark
28 Filming for The Gunfighters takes place at the Ealing Television Film Studios The Gunfighters
29 Filming for The Gunfighters takes place at the Ealing Television Film Studios The Gunfighters
30 Filming for The Gunfighters takes place at the Ealing Television Film Studios The Gunfighters
31 Filming for The Gunfighters takes place at the Ealing Television Film Studios The Gunfighters

April
1 Recording for The Celestial Toymaker takes place at Riverside Studio 1; William Hartnell is absent while on holiday The Celestial Toymaker
2 Debut broadcast of The Celestial Toymaker episode one, The Celestial Toyroom, on BBC1 The Celestial Toymaker
4 Brian Hayles is commissioned to write The Smugglers The Smugglers
4 Geoffrey Orme's “The Evil Eye”, and David Ellis' “The Clock” and “The Ocean Liner” are rejected The First Doctor
5 Lynda Barron begins recording The Ballad Of The Last Chance Saloon for The Gunfighters The Gunfighters
8 Recording for The Celestial Toymaker takes place at Riverside Studio 1 The Celestial Toymaker
9 Debut broadcast of The Celestial Toymaker episode two, The Hall Of Dolls, on BBC1 The Celestial Toymaker
15 Recording for The Gunfighters takes place in BBC Television Centre Studio 4 The Gunfighters
16 Debut broadcast of The Celestial Toymaker episode three, The Dancing Floor, on BBC1; soon thereafter, the estate of Frank Richards complains about the character Cyril's resemblance to Richards' creation Billy Bunter The Celestial Toymaker
22 Recording for The Gunfighters takes place in Riverside Studio 1 The Gunfighters
23 Debut broadcast of The Celestial Toymaker episode four, The Final Test, on BBC1; in response to the complaints from Frank Richards' representatives, a continuity announcement airs to emphasise that Cyril is not intended to be Billy Bunter The Celestial Toymaker
26 By now, Innes Lloyd and Gerry Davis have decided to drop not only Steven but also Dodo from Doctor Who, and replace them with new companions Ben Jackson and Polly; Peter Purves' and Jackie Lane's departure from the programme is announced to the press Dodo 
Chaplet
27 Filming for The Savages takes place at the Ealing Television Film Studios The Savages
28 Jackie Lane is contracted for her final six episodes Dodo 
Chaplet
28 Filming for The Savages takes place at the Ealing Television Film Studios The Savages
29 Recording for The Gunfighters takes place in Riverside Studio 1 The Gunfighters
29 Location filming for The Savages takes place at Chalfont St Peter, Buckinghamshire The Savages
30 Debut broadcast of The Gunfighters episode one, A Holiday For The Doctor, on BBC1 The Gunfighters

May
1 Location filming for The Gunfighters takes place at Virginia Water, Surrey The Gunfighters
1 Location filming for The Savages takes place at Virginia Water, Surrey The Savages
6 Recording for The Gunfighters takes place in Riverside Studio 1 The Gunfighters
7 Debut broadcast of The Gunfighters episode two, Don't Shoot The Pianist, on BBC1 The Gunfighters
13 Recording for The Savages takes place in Riverside Studios 1 The Savages
14 Debut broadcast of The Gunfighters episode three, Johnny Ringo, on BBC1 The Gunfighters
17 Kit Pedler is commissioned to write The Tenth Planet The Tenth Planet
20 Recording for The Savages takes place in Riverside Studios 1 The Savages
21 The debut broadcast of The Gunfighters episode four, The O.K. Corral, on BBC1 achieves Doctor Who's lowest-ever Audience Appreciation index: 30% The Gunfighters
22 Location filming for The War Machines takes place in London The War Machines
23 Filming for The War Machines takes place at the Ealing Television Film Studios The War Machines
24 Filming for The War Machines takes place at the Ealing Television Film Studios The War Machines
25 Filming for The War Machines takes place on the backlot of the Ealing Television Film Studios The War Machines
26 Michael Craze and Anneke Wills, cast as new companions Ben Jackson and Polly, are contracted for eighteen episodes Ben 
Jackson
26 Location filming for The War Machines takes place in London The War Machines
27 Recording for The Savages takes place in Riverside Studios 1 The Savages
28 Debut broadcast of The Savages episode one on BBC1 The Savages

June
3 Recording for The Savages takes place in Riverside Studios 1; Peter Purves leaves Doctor Who The Savages
4 Debut broadcast of The Savages episode two on BBC1 The Savages
10 Recording for The War Machines takes place in Riverside Studio 1; Michael Craze and Anneke Wills join the regular Doctor Who cast The War Machines
11 Debut broadcast of The Savages episode three on BBC1 The Savages
15 Donald Cotton's “The Herdsmen Of Aquarius”, Brian Hayles' “The Nazis”, David Ellis and Malcolm Hulke's “The People Who Couldn't Remember”, and George Kerr's “The Hearsay Machine”, “The Heavy Scent Of Violence” and “The Man From The Met” are rejected The First Doctor
17 Recording for The War Machines takes place in Riverside Studio 1; Jackie Lane leaves Doctor Who The War Machines
18 Debut broadcast of The Savages episode four on BBC1 The Savages
19 Location filming for The Smugglers takes place at Nanjizal Cove, Cornwall The Smugglers
20 Innes Lloyd writes to Jackie Lane to apologise for the abrupt nature of her departure from Doctor Who Dodo 
Chaplet
20 Location filming for The Smugglers takes place at Nanjizal Cove and Bosistow Cliffs, Cornwall The Smugglers
21 Location filming for The Smugglers takes place in Grade and Helston, Cornwall The Smugglers
22 Location filming for The Smugglers takes place in Trethewey, Cornwall The Smugglers
23 Michael Craze and Anneke Wills are introduced to the press as new companions Ben Jackson and Polly Polly
23 Location filming for The Smugglers takes place in Nanjizal Bay, Cornwall The Smugglers
24 Recording for The War Machines takes place in Riverside Studio 1 The War Machines
25 Debut broadcast of The War Machines episode one on BBC1 The War Machines
29 Gerry Davis receives permission to co-write the last two episodes of The Tenth Planet with Kit Pedler, who has fallen badly ill The Tenth Planet
30 France formally withdraws from NATO in response to perceived American and British dominance of the organisation
late
Jun
Having convinced the BBC that William Hartnell's deteriorating health necessitates a change in lead actor, Innes Lloyd approaches Patrick Troughton about taking over the role of the Doctor The Second Doctor

July
1 Recording for The War Machines takes place in Riverside Studio 1 The War Machines
2 Debut broadcast of The War Machines episode two on BBC1 The War Machines
8 Recording for The Smugglers takes place in Riverside Studio 1 The Smugglers
9 Debut broadcast of The War Machines episode three on BBC1 The War Machines
15 Recording for The Smugglers takes place in Riverside Studio 1 The Smugglers
16 William Hartnell informs his wife, Heather, that he has met with Innes Lloyd and agreed to leave Doctor Who after recording one more story at the start of the fourth production block The First Doctor
16 Debut broadcast of The War Machines episode four on BBC1 The War Machines
22 Recording for The Smugglers takes place in Riverside Studio 1 The Smugglers
22 David Whitaker is commissioned to write The Power Of The Daleks The Power Of The Daleks
29 Recording for The Smugglers takes place in Riverside Studio 1 The Smugglers
late
Jul
William Hartnell is contracted for his final four episodes The First Doctor

August
6 The BBC announces that William Hartnell will be leaving Doctor Who The First Doctor
6 Patrick Troughton is contracted to play the Second Doctor for twenty-two episodes The Second Doctor
16 Geoffrey Orme is commissioned to write The Underwater Menace The Underwater Menace
30 Elwyn Jones is commissioned to write The Highlanders The Highlanders
30 Filming for The Tenth Planet takes place at the Ealing Television Film Studios The Tenth Planet
31 Filming for The Tenth Planet takes place at the Ealing Television Film Studios The Tenth Planet

September
1 Filming for The Tenth Planet takes place at the Ealing Television Film Studios The Tenth Planet
2 Filming for The Tenth Planet takes place at the Ealing Television Film Studios The Tenth Planet
8 The first episode of Star Trek airs on American television
10 Debut broadcast of The Smugglers episode one on BBC1 The Smugglers
16 Patrick Troughton is contracted to play the Second Doctor in the “renewal” sequence at the end of The Tenth Planet episode four The Second Doctor
17 Debut broadcast of The Smugglers episode two on BBC1 The Smugglers
17 Recording for The Tenth Planet takes place in Riverside Studio 1 The Tenth Planet
24 Debut broadcast of The Smugglers episode three on BBC1 The Smugglers
24 Recording for The Tenth Planet takes place in Riverside Studio 1 The Tenth Planet
26 Filming for The Power Of The Daleks takes place at the Ealing Television Film Studios The Power Of The Daleks
27 Filming for The Power Of The Daleks takes place at the Ealing Television Film Studios The Power Of The Daleks
28 Filming for The Power Of The Daleks takes place at the Ealing Television Film Studios The Power Of The Daleks

October
1 Debut broadcast of The Smugglers episode four on BBC1 The Smugglers
1 Recording for The Tenth Planet takes place in Riverside Studio 1; William Hartnell is absent due to illness The Tenth Planet
8 Recording for The Tenth Planet takes place in Riverside Studio 1; Patrick Troughton joins the regular Doctor Who cast, while William Hartnell leaves the programme The Tenth Planet
8 Debut broadcast of The Tenth Planet episode one on BBC1 The Tenth Planet
12 Dennis Spooner is contracted to rewrite portions of The Power Of The Daleks in response to Sydney Newman's criticism of the portrayal of the Second Doctor The Power Of The Daleks
15 Debut broadcast of The Tenth Planet episode two on BBC1 The Tenth Planet
17 William Emms is commissioned to write “The Imps” The Second Doctor
22 Debut broadcast of The Tenth Planet episode three on BBC1 The Tenth Planet
22 Recording for The Power Of The Daleks takes place in Riverside Studio 1 The Power Of The Daleks
29 Debut broadcast of The Tenth Planet episode four on BBC1 The Tenth Planet
29 Recording for The Power Of The Daleks takes place in Riverside Studio 1 The Power Of The Daleks

November
1 Terry Nation proposes spinning the Daleks off into their own series The Evil Of The Daleks
2 Michael Craze's contract is extended for three stories, beginning with The Highlanders Ben 
Jackson
2 Frazer Hines is contracted to play Jamie McCrimmon in The Highlanders, with an option for three further serials; the character is being considered as a possible companion Jamie 
McCrimmon
3 Anneke Wills' contract is extended for three stories, beginning with The Highlanders Polly
5 Debut broadcast of The Power Of The Daleks episode one on BBC1 The Power Of The Daleks
5 Recording for The Power Of The Daleks takes place in Riverside Studio 1 The Power Of The Daleks
11 Filming for The Highlanders takes place at the Ealing Television Film Studios The Highlanders
12 Debut broadcast of The Power Of The Daleks episode two on BBC1 The Power Of The Daleks
12 Recording for The Power Of The Daleks takes place in Riverside Studio 1; Anneke Wills is absent while on holiday The Power Of The Daleks
14 Location filming for The Highlanders takes place at Frensham Ponds in Surrey; Frazer Hines joins the Doctor Who cast The Highlanders
15 Location filming for The Highlanders takes place at Frensham Ponds in Surrey The Highlanders
16 Filming for The Highlanders takes place at the Ealing Television Film Studios The Highlanders
18 Kit Pedler is commissioned to write The Moonbase The Moonbase
19 Debut broadcast of The Power Of The Daleks episode three on BBC1 The Power Of The Daleks
19 Recording for The Power Of The Daleks takes place in Riverside Studio 1; Michael Craze is absent while on holiday The Power Of The Daleks
21 With Jamie now made a regular character, additional location filming for The Highlanders takes place at Frensham Ponds in Surrey to re-record the story's final scene The Highlanders
22 The BBC passes on Terry Nation's proposed Dalek spin-off, prompting Nation to market the idea in America; the BBC decides to kill off the Daleks in one final Doctor Who story The Evil Of The Daleks
23 Michelle Gomez (Missy) is born Missy
26 Debut broadcast of The Power Of The Daleks episode four on BBC1 The Power Of The Daleks
26 Recording for The Power Of The Daleks takes place in Riverside Studio 1 The Power Of The Daleks
28 A revised character outline is issued for the Second Doctor The Second Doctor
28 A character outline for Jamie McCrimmon is circulated Jamie 
McCrimmon
late
Nov
Innes Lloyd decides to write out Ben and Polly, believing that Jamie is the more interesting companion Ben 
Jackson

December
late
Jun
Bernard Lodge of the BBC Graphics Unit records a new Doctor Who title sequence used from 1967 to 1969 The Second Doctor
3 Debut broadcast of The Power Of The Daleks episode five on BBC1 The Power Of The Daleks
3 Recording for The Highlanders takes place in Riverside Studio 1 The Highlanders
10 Debut broadcast of The Power Of The Daleks episode six on BBC1 The Power Of The Daleks
10 Recording for The Highlanders takes place in Riverside Studio 1 The Highlanders
11 Ian Stuart Black is commissioned to write The Macra Terror The Macra Terror
12 Anneke Wills' contract is renewed for twelve episodes, beginning with The Macra Terror Polly
12 Formal approval is given for Gerry Davis to co-write The Highlanders The Highlanders
12 Location filming for The Underwater Menace takes place at Windspit Caverns in Dorset The Underwater Menace
13 Location filming for The Underwater Menace takes place at Windspit Caverns in Dorset The Underwater Menace
14 Filming for The Underwater Menace takes place at the Ealing Television Film Studios The Underwater Menace
15 Walt Disney dies at age 65, during the production of The Jungle Book, his nineteenth animated feature film
15 Filming for The Underwater Menace takes place at the Ealing Television Film Studios The Underwater Menace
16 Filming for The Underwater Menace takes place at the Ealing Television Film Studios The Underwater Menace
17 Debut broadcast of The Highlanders episode one on BBC1 The Highlanders
17 Recording for The Highlanders takes place in Riverside Studio 1 The Highlanders
24 Debut broadcast of The Highlanders episode two on BBC1 The Highlanders
24 Recording for The Highlanders takes place in Riverside Studio 1 The Highlanders
31 Debut broadcast of The Highlanders episode three on BBC1 The Highlanders