Casualty 40th anniversary: Explosion, Dylan's ordeal, and more
Casualty 40th anniversary: Explosion, Dylan's ordeal, and more

The 40th anniversary episodes of BBC One's Casualty will air on September 5 as a special double-bill, with a trailer confirming a massive explosion at neighbouring hospital St James and personal tragedy for Dylan Keogh.

Explosion at St James

The trailer dropped this week confirms that St James hospital will be the site of a massive explosion. As Holby is thrown into complete chaos, paramedics head over and are forced to search through the rubble for bodies at the devastated hospital.

As a result of being the only hospital in the city, Holby City Hospital will be forced to deal with an influx of casualties from St James, on top of their own patients. Dylan Keogh (William Beck) is seen looking absolutely heartbroken in the trailer as he faces a very personal situation, which will happen right when he's trying to lead the staff through their darkest hour. At one point, he is surrounded by what appears to be police officers.

Stevie and Flynn in danger

The trailer confirms that Flynn Byron (Olly Rix) isn't at Holby City Hospital when the explosion takes place – he's actually near St James. Whatever happens to Flynn, he will end up with Stevie Nash (Elinor Lawless) at some point, as they are caught in a situation that forces them both to fight to survive.

During the first teaser trailer released a couple of weeks ago, there was a brief shot at the end of what appears to be an ambulance underwater. It increases the chance that paramedic favourites Jan Jennings (Di Botcher), Iain Dean (Michael Stevenson), Jacob Masters (Charles Venn), Teddy Gowan (Milo Clarke) and Indie Jankowski (Naomi Wakszlak) are going to get caught up in some life-threatening danger – but will anyone else from the hospital be in that ambulance?

A new era

These anniversary episodes will demonstrate the ambition, storytelling and emotional impact at the heart of the series, while signalling an exciting new chapter for the show. The exact time of the broadcast is currently unknown.