Christmas episodes in Casualty are rarely quiet. Over the years, festive instalments have brought heartbreak, tragedy, and even shock exits that have changed the ED forever. With the 2025 Christmas return fast approaching, fans are asking the inevitable question: who could be next to leave Holby ED under the Christmas lights?

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Faith Cadogan

Faith has endured one of the most turbulent years of any character. From her struggles with addiction to her fractured romance with Iain Dean, her arc has been marked by pain and instability. Though she has fought hard to redeem herself, recent episodes have suggested she may not have much left to give.

A Christmas departure could close her story in two ways: either a tragic relapse that costs her everything, or a bittersweet exit that sees her leave Holby for a fresh start elsewhere. For a character who has been at the heart of so much chaos, a quiet ending might be the most shocking of all.

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Flynn Byron

Flynn’s arrival as Clinical Lead was controversial from the start. His arrogance, personal mistakes, and recent confession that he feels lost without his family paint the picture of a man in freefall. His fling with a patient’s mother and subsequent medical error have further eroded his credibility.

Christmas could be the perfect moment for Flynn to bow out — either dismissed for his behaviour, or choosing to walk away in an attempt to rebuild his broken family life. His departure would also create space for a new leader in the ED heading into Series 40.

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Iain Dean

Iain is a fan favourite, but he is also a character who has been pushed to breaking point repeatedly. The loss of his mother, his fractured relationship with Faith, and his constant need to “fix” others have left him emotionally exhausted.

Some fans speculate that Christmas could mark the moment he decides to step away from the ED — perhaps to find a healthier path for himself. While it would be devastating, it would also be a fitting conclusion to a character who has given everything, often at great personal cost.

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Stevie Nash

Stevie has been thriving professionally, but her storylines have always been volatile. As one of the strongest female leads in the current cast, she carries significant narrative weight. That also makes her a prime candidate for a shocking Christmas twist.

Whether it’s a professional scandal, an accident on duty, or a dramatic personal decision, a Stevie exit would shake Holby to its core. Fans would never see it coming — which is exactly why it could happen.

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Ngozi’s Legacy

While Ngozi’s death has already devastated the ED, her story could still shape who leaves next. Characters like Nicole Piper or Jacob Masters, closely tied to her journey, could decide that Christmas is the right moment to start over. Loss often sparks departures, and Ngozi’s absence will continue to ripple through the ED.

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The Verdict

Every Christmas, Casualty delivers shock and heartbreak. This year, with the Holby era drawing to a close, the possibility of a major exit feels stronger than ever. Faith, Flynn, Iain, Stevie — each has reasons to go, and any one of them leaving would reshape the show as it heads into its 40th year.