The Captain – Mark Gatiss
Clara – Jenna Coleman
Nardole – Matt Lucas
Helen Clay – Nikki Amuka-Bird
German Soldier – Toby Whithouse
Polly – Lily Travers
Ben – Jared Garfield
Voice of the Daleks – Nicholas Briggs
And Introducing Jodie Whittaker as The Doctor
The Tenth Planet
The Doctor – William Hartnell
Polly – Anneke Wills
Ben – Michael Craze
The Doctor – Patrick Troughton (uncredited)
General production staff
Head of Production – Gordon Ronald
Production Executive – Tracie Simpson
Line Producer – Steffan Morris
Location Manager – Nicky James
Unit Manager – David Blayney
Production Co-ordinator – Sandra Cosfeld
Assistant Production Co-ordinator – Nicola Chance
Production Assistants – Tereza Dvorakova, Jamie Shaw
Unit Drivers – Paul Watkins, Joylon Davey
Unit Medic – Glyn Evans
Business Affairs Executive – Carol Griggs
Drama Account Manager – Edward Russell
Production Accountant – Maria Hurley
Camera and lighting department
1st Assistant Director – Mark Hedges
2nd Assistant Director – James DeHaviland
3rd Assistant Director – Christopher J Thomas
Assistant Directors – Lauren Pate, Kieran Hayhow
Script Supervisor – Nicki Coles
Camera Operator – Mark McQuoid
Focus Pullers – Jonathan Vidgen, Elhein De Wet
Grip – John Robinson
Assistant Grip – Ash Whitfield
Camera Assistants – Gethin Williams, Drew Marsden, Dan Patounas
Gaffer – Ben Purcell
Best Boy – John Truckle
Electricians – Mat Grace, Jack Crew, Owen Hashimi, Peter Scott
Art department
Supervising Art Director – Martin Boddison
Art Director – Tim Overson
Production Buyer – Sarah Frere
Petty Cash Buyer – Jen Saguaro
Set Decorator – Adrian Anscombe
Storyboard Artist – Mike Collins
Concept/Graphic Artist – Sam Lamont
Standby Props – Jonathan Barclay, Ryan Milton
Standby Carpenter – Jamie Farrell
Prop Hands – Scott Howe, Nigel Magni, Matt Watts
Standby Art Director – Nick Murray
Rigging – Shadow Scaffolding
Standby Riggers – Colin Toms, Thomas Williams
Head Scenic Artist – Clive Clarke
Painter – Steve Nelms
Storeman – Jamie Southcott
Prop Master – Paul Smith
Props Chargehand – Kyle Belmont
Props Driver – Gareth Fox
Construction Manager – Terry Horle
Construction Chargehand – Dean Tucker
Construction Driver – Darren Bousie
Construction Labourer – Jason Tylke
Practical Electricians – Callum Alexander, Austin Curtis
Scenic Artist – Tara McCourt
Graphics Assistant – Jack Bowes
Draughtsperson – Matt Sanders
Chargehand Carpenter – John Sinnott
Carpenters – Chris Daniels, Campbell Fraser, Dan Berrow, Jeremy Cohen, Joe Painter, Mark Painter, Matt Ferry, George Rees, Tom Berrow, Tim Burke, Jonathan Tylke
Title Concept – Billy Hanshaw
Costume department
Costume Supervisor – Gayle Woodsend
Assistant Costume Designer – Gayle Playford
Costume Assistants – Rebecca Cunningham, Jessica Lennon, Chloe Henderson
Make-up and prosthetics
Make-up Supervisor – James Spinks
Make-up Artists – Derek Lloyd, Cathy Davies
Movement
Stunt Co-ordinators – Crispin Layfield, Dani Biernat
Stunt Performers – Jamie Edgell, Belinda McGinley, Andrew Burford, Samuel Stefan, Lloyd Bass, Ian Pead, Liam Carey
Wire Supervisor – Bob Schofield
Casting
Casting Associates – Ri McDaid-Wren, Louis Constantine
General post-production staff
Post-production Supervisor – Samantha Price
Post-production Co-ordinator – Hannah Jones
Assistant Editor – David Davies
On-line Editors – Geraint Pari Huws, Christine Kelly
Assistant On-line Editor – Daniel Attwood
Special and visual effects
VFX Editor – Dan Rawlings
Additional VFX artist – Ben Pickles
Special Creature Effects & Prosthetics – Millennium FX
Colourist – Gareth Spensley
Sound
Sound Recordist – Gareth Meirion Thomas
Dubbing Mixer – Mark Ferda
Sound Maintenance Engineers – Dafydd Parry, James Abbay-Bowes
Dialogue Editor – Darran Clement
ADR Editor – Matthew Cox
Effects Editor – Harry Barnes
Foley Editor – Simon Clement
Foley Artist – Julie Ankerson
The Doctor encounters his original incarnation at the moment of his first regeneration. Both resist change as they face a mysterious force freezing people in time. With help from a returning ally, they restore those affected. The First Doctor accepts his fate, and the Twelfth Doctor finally regenerates, reflecting on his life and choosing hope as he becomes someone new.
The Twelfth Doctor, played by Peter Capaldi, meets the First Doctor during a moment of regeneration confusion in a snowy World War I setting.
The First Doctor is portrayed by David Bradley, representing an earlier, more reluctant version of the character.
Testimony is a future archive of human memories that collects and preserves consciousness at the moment of death.
Bill appears in a reconstructed form through Testimony, allowing a final emotional farewell with the Doctor.
The episode explores legacy, change, memory, and acceptance, particularly focusing on the passing of identities between incarnations of the Doctor.
