Professor Jericho – Kevin McNally
Tecteun – Barbara Flynn
Prentis/Grand Serpent – Craig Parkinson
Farquhar – Robert Bathurst
Karvanista – Craige Els
Bel – Thaddea Graham
Vinder – Jacob Anderson
Swarm – Sam Spruell
Azure – Rochenda Sandall
Diane – Nadia Albina
Millington – Nicholas Blane
Williamson – Steve Oram
Kate Stewart – Jemma Redgrave
Sontaran Commander Stenck – Jonathan Watson
Weeping Angels – Barbara Fadden, Isla Moody, Lowri Brown
Ood – Simon Carew
Voice of Ood – Silas Carson
Waiter – Guy List
Passenger – Jonny Mathers
Alastair Lethbridge-Stewart – Nicholas Courtney
Kumar – Kammy Darweish
Alfie – George Caple
General production staff
Head of Production – Jacquie Glanville
Executive Producer for the BBC – Ben Irving
Production Executive – Tracie Simpson
Line Producer – Steffan Morris
Associate Producer – Sheena Bucktowonsing
Production Manager – Delmi Thomas
Supervising Location Manager – Iwan Roberts
Location Manager – Gareth Roberts
Unit Manager – Kyle Yates
Production Co-ordinator – Sandra Cosfeld
Assistant Production Co-ordinators – Jade Stephenson, Ellie Simmons
Production Secretary – Sam Milletti
Executive Assistant – Caroline Cook
Production Office Runners – Ellie Hilton, Chris Reynolds
Unit Drivers – Paul Watkins, Jolyon Davey, Steve Darwent
Unit Medics – Glyn Evans, Andy Jones
Business Affairs – Elaine Evans, Kyle Parsons, Steve Robson
Production Accountant – Rhys Evans
Assistant Accountants – Kate Barber-Williams, Kim Dyer
Cast Payroll Accountant – Helen Searle
Contracts Booker – Leanne Bowcott
Crew Payroll Accountant – Bethan Wray
Covid Assistants – Joseph Fletcher, Jonny Tarr
Covid Testing Schedulers – Etty Stanley, Leila Arada
Camera and lighting department
1st Assistant Director – Charles Curran
2nd Assistant Director – Lauren Pate
3rd Assistant Director – Jennifer Day
Assistant Directors – Jac Lewis, Laura Thompson, Tom May
Script Supervisor – Nicki Coles
Camera Operator – Mark McQuoid ACO
Camera Trainees – Adam Clewes, Olga Walus
Focus Pullers – Jonathan Vidgen, Matt Hillier
Key Grip – John Robinson
Assistant Grips – Matt Clark, Marc Marshall
Camera Assistants – Dan Patounas, Nic Yates, Evangeline Davies
Gaffer – Mark Hutchings
Rigging Gaffer – Andy Gardiner
Best Boy – Gareth Sheldon
Electricians – Gawain Nash, Stuart Gale, Matthew Hutchings, Rhodri Moses, Owen Hashimi
Art department
Supervising Art Director – Ifan Lewis
Construction Art Director – Julia Jones
Art Department Assistants – Laura Honeybun, Megan Depledge
Art Department Co-ordinator – Hannah Miller
Production Buyer – Billie Blue Williams
Petty Cash Buyer – Sally Sharp
Set Decorator – Chris House
Action Props Buyer – Milannah Faith Summers
Concept Artist – Louis Knight
Graphic Designer – Stephen Fielding
Trainee Graphic Designer – Lois Drage
Standby Props – Matthew Ireland, Lewis Reece
Standby Carpenter – Colm Garrett
Prop Hands – Dewi Thomas, John Thomas, Liv Cheung, Tom Major
Rigging – Shadow Scaffolding
Standby Rigger – Alex Herbert
Scenic Painters – Rachel Willsher, Alex Morgan, Ana Marlene Ribeiro
HOD Painter – Scenic Steve
Painters – Mark Reece, Alison Drane
Storeman – Lucy Hookings
Prop Master – Paul Aitken
Props Chargehand – Trystan Howell
Props Driver – Paul Carmichael
Construction Manager – David Hobbs
Construction Assistant – Matthew Pike
Workshop Manager – Mark Hill
Workshop Assistant – Chris Slocombe
Construction Chargehands – Dean Tucker, Jonathan Tylke
Construction Driver – Darren Bousie
CNC Programmer – Kristian Tucker
Plasterer – Jason Tylke
Practical Electricians – Rob Hearne, Matthew Dunford
Draughtspersons – Lauren Harper, James Dyer
Trainee Draughtsperson – Rachel Ellis
Carpenters – Chris Daniels, Campbell Fraser, Matt Gronow, Charlie Wright, Marcus Scholl, Ben McDonald, Dafydd Llewelyn Jones, Mike Venables, Gemma Spence, Simon Pothecary, David Warner
Costume department
Costume Supervisor – Grace Brooks
Assistant Costume Designer – Simon Marks
Costume Cutter/Maker – Brighde Penn
Creature Costume Maker – Robert Allsopp & Associates
Costume Assistants – Ian Fowler, Jenny Tindle
Costume Trainee – Yiwen Lin
Make-up and prosthetics
Make-up Supervisor – Emma Cowen
Make-up Artists – Amy Riley, Angharad Walsh
Junior Make-up Artist – India Jones
Prosthetics Trainee – Nyle Pritchard-Trew
Prosthetics Designer – Danny Marie Elias
Prosthetics Artist – Amy Paul
Junior Prosthetics Artists – Elly Suggit, Ashley Lovett
Movement
Stunt Co-ordinators – Crispin Layfield, Belinda McGinley
Stunt Performers – Guy List, Matt Hermiston, Paul Ginns, Rob Jarman
Casting
Casting Associate – Ri McDaid-Wren
Casting Assistant – Ray B├╢hm
General post-production staff
Post-production Producer – Ceres Doyle
Post-production Supervisor – Liv Duffin
Assistant Editors – Brooke Taylor Michael, Joseph Keirle
On-line Editors – Christine Kelly, Luke Stanbury
Special and visual effects
Additional VFX – Martyn Western, Rory Williams, Zodiak VFX, The 2D Workshop, Ben Pickles
VFX Editor – Emily Lawrence
Assistant VFX Editor – Alastair Gray
Colourist – Gareth Spensley
Head Model Maker – Lee Radford
Model Makers – Penny Howarth, Lee Price
Sound
Sound Recordist – Deian Llyr Humphreys AMPS
Dubbing Mixers – Natasha Haycocks, Howard Bargroff
Sound Maintenance Engineers – Christopher Goding, Joe Malone
Sound Designer – Harry Barnes
Dialogue Editor – Darran Clement
ADR Editor – Matthew Cox
Foley – Bang Post Production
The universe continues collapsing under the Flux. The Doctor learns more about the Division, a secret organisation tied to her erased memories. Yaz and Dan encounter multiple dangers as different factions attempt to exploit the chaos. The Doctor discovers she was once a weapon of the Division, and that her past is far more complex than she believed.
The episode follows multiple storylines as characters struggle to survive the ongoing destruction caused by the Flux across time and space.
The episode features the return of the Sontarans, Cybermen, and Daleks, all attempting to take advantage of the chaos.
The Grand Serpent is revealed to have infiltrated human history, manipulating events and gaining power within organizations like UNIT.
The Doctor begins to learn more about her connection to Division and the secrets hidden in her past.
The episode explores survival, power, manipulation, and the interconnected nature of events across time.