How many seasons does Dirty Business have?

Dirty Business has 1 season with 3 episodes.

What network is Dirty Business on?

Dirty Business airs on Channel 4.

When did Dirty Business premiere?

Dirty Business premiered on February 23, 2026.

Dirty Business

Name: Dirty Business
Genre: Drama
Rating: 9
Cast: David Thewlis, Jason Watkins

9/10

Channel 4 Ended Drama

1 Season · 3 Episodes · Premiered February 23, 2026 · Ended February 25, 2026

Based on a decade-long investigation into England's water companies, and telling the real stories of whistleblowers and victims who believe their lives have been destroyed after encountering sewage polluted water, Dirty Business is a major new factual drama investigating one of the biggest potential corporate scandals in British history.Dirty Business follows the story of two unlikely detectives, who notice that the fish in the river running through their idyllic Oxfordshire hamlet are dying. They contact their water company to find out why, and the company's strange and evasive reply sparks an investigation that remains ongoing to this day.

Where to Watch: Channel 4

Official Site

Next Air Time: No upcoming air date

Seasons & Episodes

Season 1

3 episodes

E01

The Accidental Detectives

Mon, Feb 23 2026 9:00 PM GMT+0000 65 min

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.

E02

Ecocide

Tue, Feb 24 2026 9:00 PM GMT+0000 65 min

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.

E03

The Whistleblower

Wed, Feb 25 2026 9:00 PM GMT+0000 65 min

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.