Wilfred Mott – Bernard Cribbins
Sylvia Noble – Jacqueline King
Luke Rattigan – Ryan Sampson
Colonel Mace – Rupert Holliday Evans
General Staal – Christopher Ryan
Commander Skorr – Dan Starkey
Private Harris – Clive Standen
Private Gray – Wesley Theobald
Ross Jenkins – Christian Cooke
Female Student – Meryl Fernandes
Male Student – Leeshon Alexander
Captain Price – Bridget Hodson
Herself – Kirsty Wark
US Newsreader – Lachele Carl
1st Assistant Director – Gareth Williams
2nd Assistant Director – Jennie Fava
3rd Assistant Director – Sarah Davies
Location Manager – Gareth Skelding
Unit Manager – Rhys Griffiths
Production Co-ordinator – Jess van Niekerk
Production Secretary – Kevin Myers
Asst Production Co-ordinator – Debi Griffiths
Production Runner – Nicola Brown
Drivers – Wayne Humphreys, Kevin Kearns
Floor Runners – Andy Newbury, Heddi Joy Taylor
Contracts Assistants – Kath Blackman, Lisa Heyward
Continuity – Non Eleri Hughes
Script Editor – Lindsey Alford
Camera Operators – Julian Barber, Joe Russell
Focus Puller – Steve Rees, Duncan Fowlie
Camera Assistants – Jon Vidgen, Tom Hartley
Grip – John Robinson
Boom Operators – Jeff Welch, Bryn Thomas
Gaffer – Mark Hutchings
Best Boy – Peter Chester
Electricians – Steve Slocombe, Clive Johnson, Ben Griffiths
Stunt Co-ordinator – Crispin Layfield
Stunt Performers – Amanda Foster, Paul Kennington
Chief Supervising Art Director – Stephen Nicholas
Art Department Production Manager – Jonathan Marquand Allison
Supervising Art Director – Arwel Wyn Jones
Associate Designer – James North
Art Department Coordinator – Amy Pope
Set Decorator – Tim Dickel
Props Buyer – Catherine Samuel
Standby Art Director – Ciaran Thompson
Design Assistants – Peter McKinstry, Sarah Payne, Al Roberts
Storyboard Artist – Richard Shaun Williams
Standby Props – Phill Shellard, Nick Murray
Standby Carpenter – Will Pope
Standby Painter – Ellen Woods
Standby Rigger – Keith Freeman
Property Masters – Paul Aitken, Phil Lyons
Dressing Chargehand – Matthew Wild
Forward Dresser – Stuart Mackay
Senior Props Maker – Barry Jones
Props Makers – Penny Howarth, Nick Robatto, Jon Grundon
Practical Electrician – Albert James
Construction Manager – Matthew Hywel-Davies
Scenic Artists – John Pinkerton, John Whalley
Construction Chargehands – Scott Fisher, Allen Jones
Construction Workshop Manager – Mark Hill
Graphics – BBC Wales Graphics
Costume Supervisor – Lindsay Bonaccorsi
Assistant Costume Designer – Rose Goodhart
Costume Assistants – Barbara Harrington, Louise Martin
Make-Up Artists – Pam Mullins, Steve Smith, John Munro
Casting Associates – Andy Brierley, Amy Rogers
VFX Editor – Ceres Doyle
Assistant Editor – Carmen Roberts
Post Production Supervisors – Samantha Hall, Chris Blatchford
Post Production Co-ordinator – Marie Brown
SFX Co-ordinator – Ben Ashmore
SFX Supervisor – Danny Hargreaves
Prosthetics Designer – Neill Gorton
Prosthetics Supervisor – Rob Mayor
On Set Prosthetics Supervisor – Charlie Bluett
Prosthetic Technicians – Jon Moore, Lauren Welman, Sarah Lockwood, Helen Walker, Fiona Walsh, Tim Berry
On Line Editors – Mark Bright, Matthew Clarke
Colourist – Mick Vincent
3D Artists – Serena Cacciato, Ruth Bailey, Mark Wallman, Jeff North
2D Artists – Russell Horth, Bryan Bartlett, Sara Bennett, Arianna Lago, Murray Barber, Loraine Cooper, Adrian Cirulli
VFX Co-ordinators – Jenna Powell, Rebecca Johnson
VFX Production Assistant – Marianne Paton
On Set VFX Supervisor – Tim Barter
Dubbing Mixer – Tim Ricketts
Supervising Sound Editor – Paul McFadden
Sound FX Editor – Paul Jefferies
Foley Editor – Kelly-Marie Angell
Finance Manager – Chris Rogers
With Thanks to the BBC National Orchestra of Wales
ORIGINAL THEME MUSIC – RON GRAINER
CASTING DIRECTOR – ANDY PRYOR CDG
PRODUCTION EXECUTIVE – JULIE SCOTT
PRODUCTION ACCOUNTANT – OLIVER AGER
SOUND RECORDIST – JULIAN HOWARTH
COSTUME DESIGNER – LOUISE PAGE
MAKE UP DESIGNER – BARBARA SOUTHCOTT
MUSIC – MURRAY GOLD
VISUAL EFFECTS – THE MILL
VISUAL FX PRODUCERS – WILL COHEN, MARIE JONES
VISUAL FX SUPERVISOR – DAVE HOUGHTON
SPECIAL EFFECTS – ANY EFFECTS
PROSTHETICS – MILLENNIUM FX
EDITOR – PHILIP KLOSS
PRODUCTION DESIGNER – EDWARD THOMAS
DIRECTOR OF PHOTOGRAPHY – ERNIE VINCZE BSC
PRODUCTION MANAGER – PETER BENNETT
ATMOS devices activate simultaneously across the globe, flooding the atmosphere with poison gas. UNIT’s forces are overwhelmed by Sontaran ground troops. A clone of Martha is embedded in UNIT, working against them from inside. Luke Rattigan finally comprehends the full extent of his manipulation. The Doctor works desperately to ignite the atmosphere and burn off the gas. The resolution involves a self-sacrifice from an unexpected quarter. The episode closes on a quietly ominous note as Rose Tyler’s face briefly appears on the TARDIS screen, visible only to the Doctor.
ΓÇ£The Poison SkyΓÇ¥ continues directly from ΓÇ£The Sontaran StratagemΓÇ¥. The ATMOS system releases a toxic gas across Earth, forcing the Doctor and UNIT to fight a full-scale Sontaran invasion.
EarthΓÇÖs atmosphere is being filled with a poisonous gas created by ATMOS devices. This allows the Sontarans to establish control while humanity struggles to survive.
The Sontarans deploy their cloning ships and prepare to use Earth as a breeding ground for war. Their strategy involves environmental collapse to weaken human resistance.
The Doctor works with UNIT to disable ATMOS systems worldwide while coordinating a defence against the Sontaran forces. Martha Jones plays a key role in the medical and tactical response.
This episode expands large-scale military conflict within Doctor Who, reinforcing the DoctorΓÇÖs alliance with UNIT and continuing Martha JonesΓÇÖ development as a field operative alongside the Tenth Doctor.
