A Critical Incident special looking at knife crime in the UK. In Essex, a police task force is on a mission to stamp out knife crime. In London, a Metropolitan Police officer is the victim of a vicious knife attack, and a groundbreaking scheme led by West Midlands Police aims to educate young people on the consequences of knife crime.

Kent Police officers risk their lives to rescue an individual trapped on a cliff face. West Midlands police track down a man in possession of a gun, and how man's best friend came to play an essential role in British policing, tracking down criminals and protecting their handlers.