2019 (production)

January

 * 23 January - Location filming on series 12 of Doctor Who began in Cape Town, South Africa.

February

 * 7 February - Filming in South Africa ended very early in the morning at Bowmans on Bree Street. Location filming also took place at Kogel Bay in Western Cape, Kersefontein Guest Farm in Hopefield, Table Mountain and the Taal Monument.
 * 10 February - Filming then took place in Cardiff.
 * 11 February - Filming in Cardiff concluded.
 * 18 February - Filming took place at Guildhall in Swansea, Wales.
 * 19 February -Filming took place at Guildhall in Swansea, Wales.

March

 * 11 March - Filming returned to "Sheffield" outside Cardiff Central Police Station, having been set-dressed as Hallamshire Police.
 * 14 March - Filming took place in Porthkerry Country Park in Barry.
 * 15 March - Filming took place in Porthkerry Country Park in Barry.
 * 18 March - Filming took place in Cory's Building on Bute Street in Cardiff.
 * 19 March - Filming on Bute Street concluded.
 * 20 March - Filming took place on the street in front of Glamorgan Building at Cardiff University set dressed as Nazi-occupied Paris.
 * 26 March -Filming took place in Porthkerry Country Park in Barry.
 * 27 March - Filming took place on Barry Island in an old railway tunnel.
 * 28 March - Filming then took place at a Ministry of Defence unit in St. Athan, Wales.

April

 * 2 April - Filming took place around Montaña Samara near Mount Teide.
 * 3 April - Filming took place around Montaña Samara near Mount Teide.
 * 5 April - Filming took place in front of the Auditorio de Tenerife in Santa Cruz.
 * 8 April - Filming returned to Roath Lock Studios.
 * 11 April - Filming returned to Barry Island.
 * 15 April - Filming took place at Howell's School in Llandaff.
 * 19 April - Filming concluded at Howell's School.
 * 29 April - Filming took place at Tredegar House in the New Parlour, Side Hall and Morning Room.

May

 * May - Filming took place at a New York City set at Nu Boyana Film Studios in Bulgaria.
 * 2 May - Filming at Tredegar House concluded.
 * 6 May - Filming returned to Bute Street for filming yet again in Cory's Building.
 * 10 May - Filming concluded in Bute Street.
 * 22 May - Filming took place inside the Gloucester Cathedral.
 * 23 May - Filming concluded at Glouchester Cathedral.
 * 23 May - Producer Nikki Wilson took two Judoon actors to Berkeley Street to do special-effects shoots in front of a green screen.
 * 29 May - Filming took place in The Little Man Coffee Company on Bridge Street in Cardiff.
 * 30 May - Filming took place in Cardiff Bay and at the banks by the nearby canal.

June

 * 28 June - Filming took place at Merthyr Mawr Estate in Bridgend, Wales.

July

 * 1 July - Filming took place at Merthyr Mawr Estate in Bridgend, Wales.
 * 3 July - Filming took place at Merthyr Mawr Estate in Bridgend, Wales.
 * 23 July - Filming took place on Pomeroy Street in the Butetown section of Cardiff.

August

 * 5 August - Filming took place on Spencer Street in Cardiff.
 * 20 August - Filming took place at Nash Point in Wales.
 * 21 August - Filming took place at Nash Point.
 * 22 August - Filming took place at Nash Point.

September

 * 10-11 September - The Big Finish audio story Subterfuge was recorded.

October

 * October - Filming took place at Canada Lodge and Lake.
 * 2 October - Filming took place at Tyndall Street near Lumis Student Living in Cardiff.
 * 5 October - Filming continued at Tyndall Street.
 * 9 October - Filming took place adjacent to that location at Capital Quarter.
 * 21 October - Filming took place at Caerphilly Council Offices in Wales.
 * 22 October - Filming took place on Clifton Suspension Bridge in Bristol.
 * 23 October - Filming took place on Clifton Suspension Bridge in Bristol.
 * 25 October - The cast and crew held a Halloween-styled wrap party to celebrate that filming was nearing its end.
 * 29 October- Filming took place inside Cardiff Castle, on the corner of Wharton and St Mary's Street in Cardiff and at Maindy Barracks.
 * 30 October - Filming took place inside Cardiff Castle, on the corner of Wharton and St Mary's Street in Cardiff and at Maindy Barracks. Filming also happened at Capitol Shopping Centre on Churchill Way.
 * 30 & 31 October - The Big Finish audio story After the Daleks was recorded at the Moat Studios.

November

 * November - Filming took place at Smallwood Primary School in London.
 * 4 November - Big Finish's audio anthology Thin Time / Madquake was recorded at the Moat Studios.
 * 19 November - Filming for Series 12 wrapped up completely.