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.
The celebs take on more policing responsibility as special constables. Comedian and former addict Marcus Brigstocke joins a drugs raid while Jamie Laing faces down an aggressive suspect.
The celeb recruits are assigned to specialist police units. Penny Lancaster investigates a brutal assault. Katie Piper faces down her worst fears at a burning building.