The ED staff must deal with the aftermath of a shooting at a local college.

Lenny resorts to desperate measures to find a suitable donor match for his sister.

Hanssen makes an appearance in the ED, and goes head-to-head with Jordan.

After her last beating, Kirsty decides that enough is enough, and it is time to leave.

Nita scales a fire tower and forces Kirsty to tell her the truth about Warren.

Ruth's manic behaviour is exacerbated by the arrival of a mentally ill patient.

Ruth is devastated to find herself sectioned, and tries to escape from the psych ward.

Kirsty is determined to help Simone recover, but it is not as easy as expected.

Linda and Tess butt heads, while Jeff is forced to face his guilt over Polly's death.

Jordan rallies the team when they are divided by a controversial new policy.

Will the ominous secret surrounding Ruth's marriage to Edward spoil her festive mood?

The ED comes under attack from all sides following the shooting.

Jordan has high hopes for his new unit, while Yuki and Adam struggle with their workload.

Lenny makes a shocking discovery, while Jordan rallies the team for the inspection.

The events inside the college during the shooting are finally revealed.

Charlie struggles to balance his work and personal responsibilities.

With the inspection due in two weeks' time, Jordan rallies the troops.

When it looks like the ED will fail an inspection, Jordan considers resigning to save it.

Ruth makes a discovery about her husband, sending her on an emotional downward spiral.

Will Ruth reinstate Charlie on her first day as clinical standards manager?

When the ED comes under scrutiny from a whip-cracking advisor, Jay starts a mutiny.

Ruth takes revenge on Zoe by revealing that she has the highest mortality rates in the ED.

When Karl Fontayne continues to make Joe's life a misery, Jeff comes to his aid.

Jordan decides to drive to an important meeting despite his ban - with fatal consequences.

A tense confrontation between Adam and Warren has brutal consequences for Kirsty.