After months away from screens, Casualty is officially returning to BBC One on Saturday, December 28, 2025, kicking off an all-new 11-part series that promises to deliver the drama, emotion, and intensity fans have been waiting for.

The BBC confirmed the long-awaited comeback this week, teasing that the upcoming episodes will set the stage for Casualty’s landmark 40th anniversary year — complete with shocking storylines, emotional goodbyes, and fresh new faces joining the Holby ED.

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 A Brand-New Chapter Begins

The new series, which follows the heartbreaking Christmas special, will reportedly pick up in the aftermath of a devastating event that leaves the department forever changed. The BBC describes the next chapter as a “powerful exploration of courage, connection, and consequence,” set against the backdrop of a team struggling to rebuild.

The first episode of the new run — rumoured to be titled “Breaking Point” — will mark the beginning of an 11-episode arc focusing on recovery, reinvention, and the emotional fallout from recent losses, including the tragic death of Ngozi Okoye and the possible exit of Iain Dean.

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 Familiar Faces and New Arrivals

Confirmed to return are William Beck (Dylan Keogh), Neet Mohan (Rash Masum), and Kirsty Mitchell (Faith Cadogan), each grappling with personal and professional turmoil.

Meanwhile, rumours continue to swirl about Michael Stevenson’s Iain Dean, following the BBC’s recent Christmas trailer that seemed to hint at a fatal accident. Though the broadcaster has kept quiet about his fate, Stevenson’s interviews suggest fans are in for an emotional rollercoaster either way.

Joining the cast for the new 11-part run are several new faces, including a new junior doctor, a student paramedic, and a consultant with ties to the Welsh NHS, reflecting Casualty’s upcoming move to its new fictional hospital in Wales.

A BBC spokesperson confirmed:

“The new series represents both an ending and a beginning — honouring Casualty’s legacy while taking the ED in a bold new direction. Expect courage, heartbreak, and moments of real hope.”

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 Countdown to Season 40

This latest 11-part arc will lead directly into Casualty’s 40th anniversary season, which is expected to premiere in mid-2026. That milestone year will see the show officially move away from Holby and into a new hospital setting in Wales — a change the BBC describes as a “creative evolution” rather than a reboot.

The upcoming episodes will reportedly begin laying the groundwork for that transition, introducing new settings and characters that will form the backbone of the next era.

Executive producer Jon Sen explained earlier this year:

“Casualty has always reflected the world we live in. The move to Wales and the introduction of new characters will give us the chance to tell stories that feel fresh, authentic, and deeply human — while staying true to what fans love most about Holby.”

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 What Fans Can Expect

The trailer and early teasers suggest an intense start to the new series:

• Dylan Keogh facing a career-defining moral dilemma.

• Rash stepping into new responsibilities that push him to the limit.

• Faith Cadogan confronting her demons — and a shocking event that could test the entire ED’s loyalty.

And with whispers of returning faces and a few unexpected exits, Casualty’s post-Christmas run looks set to be as dramatic as ever.

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 The Verdict

Casualty returns on Saturday, December 28, 2025, with the first instalment of an 11-part series that promises to remind fans why it remains the longest-running medical drama in the world.

A new beginning, a new chapter — and perhaps, a final farewell to the Holby we’ve known for nearly four decades.