Casualty series 40

The fortieth series of the British medical drama television series Casualty commenced airing in the United Kingdom on BBC One on 2 August 2025. 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. Series 40 is expected be the last prior to a new production contract coming into force, and the final to be set in the fictional location of Holby. The series concludes the mini-series Supply and Demand.

The series airs on BBC One. Series 40 was the final series under BBC Studios' production contract, with production companies invited to tender for three subsequent years in May 2025.^[1] From series 41, Roath Lock Studios will remain as the production base for Casualty, but the series' fictional setting will move from Holby to a hospital in Wales.^[2] BBC Studios successfully bid to continue as the production company for the next three series.^[3]

The series begins with the fifth episode of the mini-series Supply and Demand, following which the show went on its regular autumn break.^[4]

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.^[5] The series returned on 10 January 2026.^[6]

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.^[7] 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.^[8] Anna Chell stars as staff nurse and midwife Jodie Whyte with Milo Clarke playing paramedic Teddy Gowan.^[8] Sammy T. Dobson continues as junior doctor Nicole Piper with Melanie Hill portraying clinical nurse manager Siobhan McKenzie.^[8] Elinor Lawless stars as consultant Stevie Nash with Kirsty Mitchell portraying Faith Cadogan, an advanced clinical practitioner (ACP).^[8] Neet Mohan appears as Rash Masum, a clinical fellow whilst Adesuwa Oni and Sarah Seggari continue as staff nurses Ngozi Okoye and Rida Amaan.^[8] Olly Rix stars as clinical lead Flynn Byron with Michael Stevenson and Charles Venn as paramedics Iain Dean and Jacob Masters respectively.^[8][9] Barney Walsh plays staff nurse Cameron Mickelthwaite with Naomi Wakszlak as trainee paramedic Indie Jankowski.^[8][9]

Supply and Demand concludes with a cliffhanger, where the team attempt to save the life of Ngozi following her relapse into alcoholism.^[10] Although the character survived, her relapse led to her departure in the second episode of Learning Curve.^[11]

Aron Julius and Jasmine Bayes join the cast from episode 9, the start of Learning Curve as resident doctors Matty Linlaker and Kim Chang.^[12]