A gritty factual series following the investigations of elite UK police units created to crack the toughest of cases.
Arson leads to a gunfight as Merseyside Police respond to two terrifying attacks on the Wirral and escalating violence results in a gang member being hunted.
Surrey Police race to stop an Albanian crime group behind a string of burglaries of multi-millionaires including Raheem Sterling.
When a woman reports being held against her will, Thames Valley Police suspect modern-day slavery and are shocked by the identity of the main suspect.
City of London Police begin a dangerous high-speed chase when the UK's most notorious phone snatcher races into the Square Mile on an illegal electric bike.