Cryer and Conway are training for the Divisional ¼ marathon. Cryer notices a man in a wheelchair being mugged by some youths and he pulls a muscle when he gives chase. Cryer is under pressure. Because Penny is sick, Cathy is acting sergeant and out on the beat. Quinnan and Stamp go to an accident. Two rival gangs are involved. Roach tries to take a witness statement from 2 Asians. Carver is interviewing one of the occupants of the car. Able tries to talk to an Asian neighbour of the injured man who dies in hospital.