As crime figures go up and budgets go down, police forces are relying on an army of 12,000 volunteer officers known as special constables. Five famous faces join the ranks.
Katie Piper, Penny Lancaster, Made in Chelsea's Jamie Laing, Gogglebox's Sandi Bogle and Marcus Brigstocke join officers at Cambridge Constabulary, responding to real 999 calls
Five famous faces join officers at Cambridge Constabulary, responding to real 999 calls
Jamie Laing takes part in a drugs raid on a cannabis farm
Comedian and former addict Marcus Brigstocke joins a drugs raid
Penny Lancaster investigates a brutal assault. Katie Piper faces down her worst fear.