PC Greaves and his four-year-old German shepherd Riley track down a motorist who panicked when he saw flashing blue lights and ran off, while PC Whitaker and his dog Roscoe have to disarm a man who has a 12-inch knife. During a search of three vehicles used by a suspected drug dealer, sniffer spaniel Smut and handler PC Carlin find a wallet with almost £1,000 inside it hidden under a dashboard. Narrated by Ken Stott