The police ombudsman investigates the team after a disastrous night shift. Helen uncovers a scandal, while a crisis at home has Grace doubting her career choice.

The team work together after the shooting. Stevie clashes with the spooks, Mo learns the truth about his father, and Grace accepts that she might break her promise to Angela.

A loyalist gangland feud turns up the pressure on the section. Annie makes an impetuous decision on a night out.

Mount Eden descends into chaos as Grace tries to get Henry out from under Lee’s control. Happy finally learns the truth.