It's an eventful day for Matt Boyden. Having discovered the identity of Abi's father, he confronts the girl's mother, his hated colleague Acting DI Sam Nixon, threatening to tell the tearaway teen everything he knows. Then he gets a blast from the past when his own estranged, crack-addicted daughter Amy is found and brought in for questioning. But it soon becomes clear none of these loose ends will ever be tied when the dodgy sergeant answers a seemingly routine callout to a suspect package—only to fall victim to a drive-by shooting. (For the answer to who pulled the trigger and why, viewers will have to tune in to the new Bill spin-off series MIT: Murder Investigation Team.)