Dirty Business
9pm, Channel 4
In 1999, eight-year-old Heather Preen died after contracting E coli while playing on a beach. Twenty years later, two men in Oxfordshire contacted their water company asking about dead fish in the local river. This striking three-part drama is based on a decade-long investigation into England’s water companies dumping raw sewage. It will have the nation furiously demanding answers. Jason Watkins, David Thewlis, Asim Chaudhry and Posy Sterling star. Hollie Richardson
