The revolving doors of Holby City Hospital never stop turning and 2025 is another busy year for cast and character entrances and exits.

Here’s our guide to all the exciting new arrivals, shocking exits and surprise appearances taking place in BBC1’s medical drama in the new year.

We’ve divided this Casualty 2025 Who’s Who into five parts: New Arrivals, Leavers, Returning, Special Guests and Rumoured.

Happy reading fellow Casualty fans!

Please note: This is a live document and will be updated regularly. For clarity this has been written in chronological order, so please scroll down in each section for the newest updates.

Casualty 2025 — a complete guide to the characters and cast of BBC1’s medical drama

Casualty 2025 — New Arrivals

Indie Jankowski — played by Naomi Wakszlak

The first new arrival of 2025 technically makes her debut in 2024, but as it’s in the final episode of the year we feel it’s fair enough to include her here.

From the off-set Indie Jankowski (Naomi Wakszlak) makes a strong impression on paramedic boss Jan Jenning (Di Botcher) – both good and bad. She’s talented, top of her class and confident. However, this confidence veers into cocky arrogance which belies her on-the-job experience.

Indie Jankowski is played by Naomi Wakszlak, whose other credits include Back, Above the Clouds, Pennyworth and Doctors.

First appearance: Off Duty, Saturday 28 December 2024.

Sean Redmond — played by Seth Somers

Surgeon Sean Redmond isn’t backwards when it comes to stating what he wants – something that doctor Rash Masum learns from the get-go when he and the newcomer literally collide in Holby ED. With neither of them looking where they’re going, Sean (Seth Somers) demands Rash (Neet Mohan) replace his broken phone. Then things get even more awkward when Rash’s cousin doctor Tariq Hussein (Manpret Bachu) reveals Sean is his new housemate.

Something tells us that Sean is going to be a major headache for Rash!

Sean Redmond is played by Seth Somers whose other credits include We Were the Lucky Ones and A Thousand Blows.

First appearance: On Trial, Saturday 4 January 2025.

Russell Whitelaw — played by Robert Bathurst

Robert Bathurst is joining the staff at Holby Hospital as conflicted surgeon Russell Whitelaw in a new boxset called Internal Affairs in March 2025.

Best known for his roles in Downton Abbey, Coldfeet and Doctor Who, Robert stars as surgeon Russell Whitelaw, who is described as: “A brilliant, but controversial surgeon.”

When Russell makes his debut he won’t be alone – as three new characters will becoming along with him.

Speaking about his new role Robert says: “They built an operating theatre especially for this block of stories so all of us, actors and crew, were on a voyage of discovery.”

More information on Robert’s new role and Internal Affairs here

Flynn Byron — played by Olly Rix

Olly Rix has been confirmed as Holby City Hospital’s new ED Clinical Lead and will be making his Casualty debut in a new boxset called Internal Affairs airing in March 2025. He’s playing medic Flynn Byron, who is married to surgeon Russell Whitelaw’s daughter Claire. Trouble on the home front threatens to spill over into Flynn’s professional life when Russell discovers his son-in-law has been cheating on his daughter!

Olly Rix is best known for his roles in Agatha Raisin, Our Girl and, of course, Call The Midwife where he played Trixie Franklin’s (Helen George) husband, Matthew Aylward before the character moved to New York at the end of season 13.

Speaking about joining the medical drama Olly Rix says:

“It’s been a pleasure to join the Casualty cast in such a dynamic role. Flynn crashes into the world from a very different background, resulting in a complex and exciting story in Internal Affairs and beyond. It’s a brilliant new chapter for the show and I am excited for the audience to get to know Flynn.”

Read more about Olly’s Casualty role here

Casualty 2025 — Leavers

At the time of writing, all Casualty regulars seem to be here to stay – although things were looking pretty hairy for Iain Dean in the Christmas Special!

The daring paramedic has more lives than a cattery, but will he finally run out of luck in the year ahead? We hope not, but only time will tell…

Casualty 2025 — Returning

There has been no confirmation of any previous Casualty characters making a return to the show for 2025. However, we do like to speculate. See the ‘Rumoured’ section below for our unfounded musings…

Casualty 2025 — Special Guests

Jack Wilkinson as father-to-be Aaron Bayliss

Jack Wilkinson joins the series in January 2025 as Aaron Bayliss, who crashes into doctor Dylan Keogh and nurse Jodie Whyte’s world during a life and death tragedy.

Aaron is taking his heavily pregnant wife Thea to hospital when his car careers into the restaurant where Dylan (William Beck) and Jodie (Anna Chell) are having dinner. The medics are faced with the choice of whether or not to perform emergency surgery in less than ideal conditions at the scene, and afterwards Aaron has questions…

Jack Wilkinson’s credits include Holby City, The Doll Maker, This is Going to Hurt and Biff & Chip.

First appearance: On Trial, Saturday 4 January 2025.

Ravin J. Ganatra as Kareem Hussein

Ravin J. Ganatra makes his first appearance as Tariq Hussein’s father Kareem when he’s brought into Holby ED after a fall.

Kareem makes a point in asking for his nephew Rash (Neet Mohan) but not Tariq (Manpreet Bachu) and orders his nephew to keep a serious medical secret from his son.

Ravin J. Ganatra’s credits include Prime Suspect, Coronation Street, Doctor Who and This England. He also had a previous guest role on Casualty in 1996 episode Waterwings.

First appearance as Kareem Hussein: On Trial, Saturday 4 January 2025.

Casualty 2025 — Rumoured

Olly Rix

There have been rumours since last Summer that Call the Midwife star Olly Rix has been seen filming on Casualty’s Cardiff-based set. With senior nurse Siobhan McKenzie’s tenure as Acting Clinical Lead coming to a close in 2025, could Olly be a perfect fit for the role of new Clinical Lead?

As of February 10 2025 Olly has been confirmed as new Casualty lead Byron Flynn. Read about his appointment and introductory storylines here.

Elle Gardner — played by Jaye Griffiths

Total supposition on our part here, but with a major father and son storyline brewing between paramedic Jacob Masters (Charles Venn) and his offspring Blake Gardner (David Ajayi, Supacell, EastEnders), we have everything crossed that Blake’s mother Elle Gardner (originally played by Jaye Griffiths from 2016 until 2019) will make a surprise return. Double-joy if she’s followed by Jacob’s ex, Connie Beauchamp (Amanda Mealing).

Max Cristie — played by Nigel Harman

Again, pure speculation, but as the character still gets mentioned in the show, it would be remiss not to indulge ourselves here.

In the 2023 episode Crash Landing maverick medic Max Cristie came in like a whirlwind and created delicious chaos for a year, before departing Holby with his daughter Jodie Whyte’s kidney in 2024’s Easy Way Out.

In Off Duty, the opening episode of this year’s first boxset Public Property, a phonecall from Max to pal Dylan Keogh (William Beck) about Jodie (Anna Chell) set off a chain of events with far-reaching consequences for both characters. The chances of Max turning up to help clear matters up is slim to nothing, but that won’t stop us entertaining the possibility!

More updates coming soon…