Details of the Casualty Christmas special have revealed the staff at Holby City Hospital will be facing a blood shortage crisis in tense scenes.

The festive special of the long-running BBC medical drama is due to air on Saturday night, ahead of Christmas, which this year lands on Wednesday. And the the full fifty minute special, which has the title Casualty: All I Want for Christmas, will explore the consequences of a blood shortage as one young patient is found to need a transfusion.

The tense episode begins with a nurse noting that supply levels are low – only for an eight-car pile-up to put pressure on the hospital as accident victims are rushed to the emergency rooms. Among those in need is a six-year-old girl who is in need of a blood transfusion on Christmas Day.

The episode also touches on recent political events by exploring a storyline that reflects the recent Infected Blood Compensation Scheme Summary which saw the government vow to provide compensation to patients who contracted blood diseases due to transfusions in the 1980s. In the Casualty sub-plot, one of the car crash victims refuses blood at the risk of his life due to the death of his sister, who had unknowingly been given infected blood in the 1980s during childbirth.

‌

We use your sign-up to provide content in ways you’ve consented to and improve our understanding of you. This may include adverts from us and third parties based on our knowledge of you. More info

The episode features testimonies from real-life contributors who have faced problems as a result of blood donation issues in the UK, including a man who had haemophilia and was a victim of the infected blood scandal. He said he was infected with HIV and hepatitis C by the time he was five.

Meanwhile, further scenes involve the fictitious story of a postman who becomes a victim of the car crash while out delivering packages on Christmas Day. During the episode, nurse Cameron Micklethwaite played by Barney Walsh – son of The Chase presenter Bradley Walsh – declares the hospital is “out of blood”.

In one of the real-life testimonies, the father of a young woman who had a rare blood cancer said she was “utterly reliant on the generosity” of those who donated blood. “It gave us three and a half precious years with her,” he said.

The episode also features paramedic Iain Dean volunteering to pick up more blood as the hospital’s supply dwindles, before becoming involved in a car accident. In an interview, a real-life volunteer blood courier says: “We do it because we’re saving people’s lives.” The special episode, called All I Want For Christmas, is already available to stream via the BBC iPlayer, and will air on BBC One at 9.20pm on Saturday 21 November.