Ep 4. Death's Door (2)

After a prison nurse dies from a drug overdose, the team is called in to investigate. Initially, it seems that she is just another victim of the opioid epidemic wreaking havoc in the UK, but as the team delves deeper, they uncover a trail of corruption and cover-ups that leads to the highest levels of government.

Meanwhile, Dr. Harry Cunningham (Tom Ward) struggles to come to terms with his own mortality as he battles cancer. With the support of his colleagues, he faces the difficult decision of whether or not to undergo a risky surgery that may save his life but could also leave him with permanent complications.

The investigation takes an unexpected turn when the team uncovers a connection between the nurse's death and a controversial new drug being tested at the prison. As they race to uncover the truth, they encounter resistance from those who stand to lose the most if the truth is revealed.

With tensions mounting and the stakes higher than ever, the team must put everything on the line to bring justice to the nurse and her family and to prevent anyone else from falling victim to the corrupt system.

As the episode reaches its conclusion, the team faces a shocking revelation that will change their lives forever and leave viewers on the edge of their seats.