The fortieth series of the British medical drama television series Casualty commenced airing in the United Kingdom on BBC One on 2 August 2025 and concluded on 18 April 2026. The series focuses on the professional and personal lives of medical and ancillary staff at the emergency department (ED) of the fictional Holby City Hospital. Roxanne Harvey serves as executive producer, while Liza Mellody continued as series producer. The series contains the second-half of the mini-series Supply and Demand and concludes with Learning Curve.
Production
The series airs on BBC One. The series begins with the fifth episode of the mini-series Supply and Demand, following which the show went on its regular autumn break.
On 3 October 2025, the next mini-series titled Learning Curve, consisting of twelve episodes was announced, introducing two new resident doctors to the cast. The series returned on 10 January 2026.
Cast The fortieth series of Casualty features a cast of characters working for the NHS within the emergency department of Holby City Hospital and the Holby Ambulance Service. Sixteen main characters returned from the previous series.
William Beck appears as Dylan Keogh, a consultant in emergency medicine with Di Botcher portraying Jan Jenning, the operational duty manager at Holby Ambulance Service. Anna Chell stars as staff nurse and midwife Jodie Whyte with Milo Clarke playing paramedic Teddy Gowan. Sammy T. Dobson continues as junior doctor Nicole Piper with Melanie Hill portraying clinical nurse manager Siobhan McKenzie. Elinor Lawless stars as consultant Stevie Nash with Kirsty Mitchell portraying Faith Cadogan, an advanced clinical practitioner (ACP). Neet Mohan appears as Rash Masum, a clinical fellow whilst Adesuwa Oni and Sarah Seggari continue as staff nurses Ngozi Okoye and Rida Amaan. Olly Rix stars as clinical lead Flynn Byron with Michael Stevenson and Charles Venn as paramedics Iain Dean and Jacob Masters respectively. Barney Walsh plays staff nurse Cameron Mickelthwaite with Naomi Wakszlak as trainee paramedic Indie Jankowski.
Supply and Demand concludes with a cliffhanger, where the team attempt to save the life of Ngozi following her relapse into alcoholism. Although the character survived, her relapse led to her departure in the second episode of Learning Curve.
Aron Julius and Jasmine Bayes join the cast from episode 9, the start of Learning Curve as resident doctors Matty Linlaker and Kim Chang. Bayes left the show in the series finale after her character Kim, who had been battling Anorexia nervosa, died on-screen.
Main characters
William Beck as Dylan Keogh Di Botcher as Jan Jenning Anna Chell as Jodie Whyte Milo Clarke as Teddy Gowan Sammy T. Dobson as Nicole Piper Melanie Hill as Siobhan McKenzie Elinor Lawless as Stevie Nash Kirsty Mitchell as Faith Dean Neet Mohan as Rash Masum Adesuwa Oni as Ngozi Okoye (until episode 10) Olly Rix as Flynn Byron Sarah Seggari as Rida Amaan Michael Stevenson as Iain Dean Charles Venn as Jacob Masters Naomi Wakszlak as Indie Jankowski Barney Walsh as Cameron Mickelthwaite Jasmine Bayes as Kim Chang (episodes 9–20) Aron Julius as Matty Linlaker (from episode 9)
Recurring characters
Jamie Marie Leary as Sunny Callahan (until episode 7) Charlie Ann Upton as Cassie Woods (until episode 6) Aryel Tsoto as Obina "Obi" Okoye (episodes 3–8) Hannah Traylen as PC Ashley Sullivan (episodes 10–17) Cai Brigden as Chris Banfield (episodes 11–19) David Ajayi as Blake Gardner (episode 14)
Guest characters
Luke Azille as Arlo Martin (episode 1) Tai Hilferink as Badger (episodes 1 & 2) Ross Waiton as Tim Matthews (episodes 3, 7 & 8) Gabriel Goulding as Jake Callahan (episodes 4–7) Kirsty Armstrong as Vicky Woods (episodes 5 & 6) Bill Fellows as Terry Melville (episode 5) Paksie Vernon as Lauren Maddox (episodes 5 & 6) Sharon Percy as Tina Piper (episode 6) San Shella as DCI Ahwalia (episodes 7 & 8) Israel J. Fredericks as Joel Hannigan (episode 7) Lizzie Wilde as Cleo Hainey (episode 8) Lola Grace Maurice as Millie Byron (episode 8) Gwyneth Strong as Ceri Mayland (episodes 11, 15 & 19) Morgan James as Bryn Ellis (episodes 12 & 16) Richard Dempsey as Thomas Delaware (episodes 12 & 16) Derek Griffiths as Leon Powell (episode 12) Georgia Mackenzie as Fiona Shaw (episode 12) Kyla Frye as DI Zara Hughes (episodes 14-16 & 18) Tom Mulheron as Luka Malinovsky (episode 20)
Episodes
References