'Zero Sum Game'

Sam has high hopes of returning to Afghanistan, but when she falters during a training exercise, she is forced to question whether she will ever be ready to face a war zone again.

On her way home she comes across Captain Morrison, a former army colleague, who is slumped in a crashed vehicle. Suspecting that he has had an epileptic fit, she is torn over whether she should tell the army the truth of her suspicions, which could end his military career.

Meanwhile, new nurse Fletch (played by Alex Walkinshaw) joins the ED team. He makes a favourable impression with everyone - except for Lloyd.

The pair are forced to work together to help Amy, whose initial joy at discovering she is pregnant turns to horror when the true diagnosis is made.