The reasons behind Barrowman's demotion are revealed during a nuclear fallout drill, and the corporal is pushed to the edge when White-Bowne and Wratten play a macabre prank on him. During patrol, Lomax tells Keenan he enrolled to settle an old score, while Sgt Butcher learns Audrey is pregnant.

• Patrick Baladi
• Michael Nardone
• Emma Stansfield