Back at work after maternity leave, Maryam finds herself immediately on the front line. Catherine sets her sights on a consultant job, and Helen's marital problems emerge.
As Maryam fights to control her anxiety, Catherine weighs up what it will take to progress as a female surgeon, and Helen's sister Debbie comes back into her life.
A routine operation takes a critical turn for Catherine and Maryam wrestles with the idea of adopting another child.
A gruelling night shift leads Helen to confide in Jack, and Maryam and Catherine respond to an emergency on a night out.
Motherhood throws everything at Catherine as she fights Jack for the consultant job, and Helen makes a shocking discovery.
Maryam and Catherine speak at the investigation panel, and all three women make decisions about the future.
