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The War Between the Land and the Sea The Deep

Episode 3 of 5 from The War Between the Land and the Sea

Sunday, 14th December 2025 8:30PM BBC One (44 mins)

The Deep Synopsis

Barclay makes a terrifying descent into the world of Homo Aqua. Back on the land, Kate stands alone as Downing Street conspires with the army to change the course of the war.

Episode Order

  • Episode 3 of 5 from The War Between the Land and the Sea

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Credits

Credits
  • Writer Pete McTighe
  • Director Dylan Holmes Williams
  • Producer Edoardo Ferretti
  • Executive Producer Joel Collins
  • Executive Producer Pete McTighe
  • Executive Producer Russell T Davies
  • Executive Producer Julie Gardner
  • Executive Producer Jane Tranter
  • Barclay Pierre-Dupont Russell Tovey
  • Salt Gugu Mbatha-Raw
  • Kate Lethbridge-Stewart Jemma Redgrave
  • General Austin Pierce Colin McFarlane
  • Ted Campbell William Gaminara
  • Captain Louise Mackie Hannah Donaldson
  • Min Tso Mei Mac
  • Ravi Singh Manpreet Bachu
  • Shirley Bingham Ruth Madeley
  • Captain Daniel Gaitz John Addison
  • Barbara Pierre-Dupont Ann Akinjirin
  • Kirby Pierre-Dupont Cat Gannon
  • Commander Olivia Harper Teri Ann Bobb-Baxter
  • Prime Minister Harry Shaw Vincent Franklin
  • Sir Keith Spears Patrick Baladi
  • General Dominique Dussolier Barbara Probst
  • General Oscar Gunsberg Stewart Alexander
  • Priya Lakhani Seeta Indrani
  • Colonel Christofer Ibrahim Alexander Devrient
  • Steve Chesney George Robinson
  • Corporal Jane Hart Catherine Garton
  • Homo Aqua Gethin Alderman
  • Homo Aqua Charles Sandford
Characters
Barclay Pierre-Dupont played by Russell Tovey in Doctor Who: The Deep Barclay Pierre-Dupont Russell Tovey Salt played by Gugu Mbatha-Raw in Doctor Who: The Deep Salt Gugu Mbatha-Raw Kate Lethbridge-Stewart played by Jemma Redgrave in Doctor Who: The Deep Kate Lethbridge-Stewart Jemma Redgrave General Austin Pierce played by Colin McFarlane in Doctor Who: The Deep General Austin Pierce Colin McFarlane Ted Campbell played by William Gaminara in Doctor Who: The Deep Ted Campbell William Gaminara Captain Louise Mackie played by Hannah Donaldson in Doctor Who: The Deep Captain Louise Mackie Hannah Donaldson Min Tso played by Mei Mac in Doctor Who: The Deep Min Tso Mei Mac Ravi Singh played by Manpreet Bachu in Doctor Who: The Deep Ravi Singh Manpreet Bachu Shirley Bingham played by Ruth Madeley in Doctor Who: The Deep Shirley Bingham Ruth Madeley Captain Daniel Gaitz played by John Addison in Doctor Who: The Deep Captain Daniel Gaitz John Addison Barbara Pierre-Dupont played by Ann Akinjirin in Doctor Who: The Deep Barbara Pierre-Dupont Ann Akinjirin Kirby Pierre-Dupont played by Cat Gannon in Doctor Who: The Deep Kirby Pierre-Dupont Cat Gannon Commander Olivia Harper played by Teri Ann Bobb-Baxter in Doctor Who: The Deep Commander Olivia Harper Teri Ann Bobb-Baxter Prime Minister Harry Shaw played by Vincent Franklin in Doctor Who: The Deep Prime Minister Harry Shaw Vincent Franklin Sir Keith Spears played by Patrick Baladi in Doctor Who: The Deep Sir Keith Spears Patrick Baladi General Dominique Dussolier played by Barbara Probst in Doctor Who: The Deep General Dominique Dussolier Barbara Probst General Oscar Gunsberg played by Stewart Alexander in Doctor Who: The Deep General Oscar Gunsberg Stewart Alexander Priya Lakhani played by Seeta Indrani in Doctor Who: The Deep Priya Lakhani Seeta Indrani Colonel Christofer Ibrahim played by Alexander Devrient in Doctor Who: The Deep Colonel Christofer Ibrahim Alexander Devrient Steve Chesney played by George Robinson in Doctor Who: The Deep Steve Chesney George Robinson Corporal Jane Hart played by Catherine Garton in Doctor Who: The Deep Corporal Jane Hart Catherine Garton

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