About this season
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.
Episodes (3)
E1
1. Episode 1
Aired 23 February 2026 • 51 min
When a Oxfordshire river turns brown, two locals ask the water company why. So begins an epic 10-year trail to the heart of one of the great corporate and regulatory scandals in our country’s history.
E2
2. Episode 2
Aired 24 February 2026 • 52 min
The drama continues. An eight-year-old girl dies after a trip to the beach. Was it the raw sewage dumped there?
E3
3. Episode 3
Aired 25 February 2026 • 52 min
The drama concludes as Dirty Business flushes out a story of pollution, criminal convictions and corporate wealth