Burnside arrests a man on suspicion of robbery with violence. Tosh and Carver get given wrong addresses. Burnside's suspect is identified in an id parade but she tells Jim his snout told her the suspect is guilty. It turns out he is not guilty of robbery with violence but his mum brings in her vacuum cleaner with drugs in the bottom. Reg chases a mother who tried to buy a watch with a stolen credit card and recognises her as a habitual criminal.