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Dirty Business
RELEASED·SERIES·EN

Dirty Business

Mon, Feb 23, 2026
  • Drama
  • Crime
Series · Synopsis

Synopsis

Two amateur detectives in an Oxfordshire village discover dying fish in their river. When they contact the water company for answers, the company's odd, evasive response prompts them to launch an investigation that continues today.

Trailer

Watch the trailer

Where to watch

Streaming on

  • Channel 4↗
Cast

Top of the call sheet

  • David Thewlis
    David Thewlis
    as Ash Smith
  • Jason Watkins
    Jason Watkins
    as Peter Hammond
  • Posy Sterling
    Posy Sterling
    as Julie Preen
  • Tom McKay
    Tom McKay
    as Mark Preen
  • Alex Jennings
    Alex Jennings
    as Sir James Bevsn
  • Asim Chaudhry
    Asim Chaudhry
    as Mickey Lazarus
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Episodes

1 season · 3 episodes

Ended · 3 aired
Season 1
3 episodes · 3 aired
▾
  • E1
    The Accidental Detectives
    Aired · Mon, Feb 23, 2026 · 65m

    When retired detective Ash Smith and Oxford professor Peter Hammond notice the water in their local river has turned brown, they begin to ask questions, leading to the start of a 10-year investigation.

  • E2
    Ecocide
    Aired · Tue, Feb 24, 2026 · 65m

    Continuing the fact-based drama about retired detective Ash Smith and Oxford professor Peter Hammond and their 10-year investigation into the sewage scandal. The drama also follows the Preen family, who went in search of answers after their eight-year-old daughter died after playing on a beach where a nearby pipe had been discharging.

  • E3
    The Whistleblower
    Aired · Wed, Feb 25, 2026 · 65m

    Fact-based drama about a retired detective and an Oxford professor and their investigation into the sewage scandal. The story also follows surfer Reuben, who believes his chronic illness, Meniere's disease, is a result of surfing in polluted water.