Details

The five-part series follows Barclay (Russell Tovey), a low-level UNIT staff member whose ordinary life becomes a world of terror when an ancient species rises from the sea. Barclay becomes humanity's ambassador when the mysterious Salt emerges from the Tank at a summit on the Thames. UNIT, led by Kate Lethbridge-Stewart (Jemma Redgrave), fights for control as humanity faces destruction.

Leading the five-part series is Russell Tovey (Feud, American Horror Story: NYC) and Gugu Mbatha-Raw (Surface, Loki). The series will also see the return of UNIT alumni Jemma Redgrave (Doctor Who, Grantchester) who will reprise her role as Kate Lethbridge-Stewart and Alexander Devrient (Doctor Who, Ted Lasso) as Colonel Ibrahim.

The series is created by Doctor Who showrunner and Executive Producer Russell T Davies, who has written the series with Executive Producer Pete McTighe (A Discovery of Witches, The Pact, Doctor Who).

The War Between the Land and the Sea is released on DVD, Blu-ray and 4K UHD 23rd February 2026 from BBC.

Special Features

  • Deep Dive' Documentary - Access all areas: go behind the scenes with cast and crew (~30 mins)
  • Character Dossiers: Barclay, Ibrahim, Kate, Salt & Homo Aqua
  • Set Tours: Empress Hall and Homo Aqua Habitat
  • Video Diaries: Alex and Homo Aqua
  • Interview with the Writers (~15 mins)
  • Trailer
  • Extended and deleted scenes for Episodes 1-4
  • Audio Commentaries for Episodes 1 & 3
  • Sea Devils (2025 version) - a brand new 90-minute edit of the classic Third Doctor story