Boyden tasks Garfield and Ashton with setting up an observation on a parade of shops where a gang of young dealers have been operating. When they catch a youngster taking a package left behind by a dealer, a search of his home uncovers a log of transactions. The pair hope they’ve found their ringleader, until Cryer identifies the boy and his mother of the family of a Barton Street sergeant who died of a heart attack during a raid a few months earlier. Admitting he has been tailing the ringleaders to supply Barton Street with info, the boy agrees to help Garfield and Ashton bring down the gang responsible. Meanwhile, an old flame of Boyden's approaches Harker with info an armed robbery involving her husband. Boyden is skeptical, but Harker is convinced of her story when she says her son is involved and she wants him to avoid punishment. However, when the raid goes ahead and the boy dies after being hit by a car during his attempts to escape the scene.
