Robson Green stars as emotionally tortured Detective Inspector Dave Creegan of the OSC, Organised and Serial Crime unit, an elite crime squad dedicated to combating serial crime in the original UK production. DI Creegan and his colleagues, DI Susan Taylor (Nicola Walker) and DC Mark Rivers (Shaun Dingwall), are forced to confront the consequences of dealing with the worst kind of criminal. Fiercely independent, easily agitated, often stubborn, and virtually shameless as a result of his brain injury, Creegan is apt to ignore common sense - and sometimes even the laws he is sworn to uphold - in his passionate, unending quest for justice.
The show ran for 3 seasons, from 1997-1999, and spanned 16 episodes. An American version- starring Jeffrey Donovan in the role of Creegan- aired in 2004 and ran for 1 season.