What is The Traitors' secret formula for turning a TV show into a global hit?

The hugely successful reality competition series The Traitors is about to land in Ireland, following much loved versions in the UK, US, Australia and beyond. It’s the latest in a long line of television programmes to go from concept to global franchise - think Big Brother, Love Island, MasterChef. This trend seems to be taking up more and more airtime on our screens.

But how does a show actually make that leap? What’s the business behind international formats? And what does the rise of these "global-but-local" shows tell us about how we watch TV today? We’re joined by Sunday Times columnist and arts journalist Aoife Barry.

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