Tess struggles to keep her emotions under control as her raging hormones give her a ""pregnancy brain"". When a pedantic husband tries to stop his pregnant wife playing squash, a scuffle breaks out between them and Tess arrests him for assault. Ben sides with the husband, and suggests they should try counselling, but Tess seems hell bent on arresting him. Tom feels that Tess' personal life and her pregnancy is affecting her professional decisions—and suggests Tess stand down from operational duties… but his suggestion only makes things worse… until Tess is confronted with a horrible reality.
