With knife crime on the rise, officers are carrying out checks at retail outlets, determined to make sure everything possible is being done to stop knives falling into the wrong hands. It’s against the law to sell knives to anyone under the age of 18, but they discover not all stores are getting the message.

Elsewhere, officers call a rail company to account after a 13-year-old boy suffers catastrophic injuries, and they catch up with a Lamborghini-driving fraudster who has so many aliases that he loses track of who he is supposed to be. Show less