Episode 4

In Brixton custody suite, a detainee has stripped naked and is refusing to come out of his cell and go to court. In another cell, a man has been brought in for threatening a supermarket cashier with a knife. In Croydon, a detective investigates a series of cat killings, bringing in a specialist in animal forensic pathology and criminal profiling experts from the National Crime Agency. While at New Scotland Yard, senior police officers plan the strategy for the year's anti-capitalist Million Mask March.