Overview
- A 20‑second teaser released on Saturday 25 July confirms a two‑part anniversary double bill will air on BBC One and iPlayer on 5 September.
- The BBC synopsis describes a 'high‑stakes major incident' with explosions, mass rescue scenes, armed police and ambulance operations that throw Holby City Hospital into chaos.
- The trailer and official notes single out characters including Dr Dylan Keogh, Flynn Byron and Stevie Nash for life‑threatening peril and personal tragedy while avoiding explicit plot outcomes.
- Fans have speculated online that long‑running character Dylan Keogh may be killed off but that idea remains unconfirmed by the show or its producers.
- The episodes are billed as a commemoration and a reset: BBC reporting links the special to a new production deal and a planned move of the story to a different fictional Welsh hospital next year, with Casualty filmed at Cardiff’s Roath Lock since 2011.