Casualty rejected 40th anniversary nostalgia and proved why it still matters

The anniversary episodes air on BBC One this evening (Picture: BBC/ Shutterstock/Getty/Metro)

How do you keep a TV show alive for 40 years? Don’t look at me.

It’s a dilemma that’s incredibly difficult to answer in this day and age, when we’re living in a world of streaming services, and the audience has an incredible luxury of starting a show and skipping onto another one within seconds.

Tricky though the question is, BBC One’s Casualty has the answer.

To celebrate four decades on our screens that have gone from tiny to ginormous, the medical ...