Preparing for The Capture allowed the actress to indulge her own interest in police work, as she spent time shadowing the homicide department at the Met to broaden her knowledge of the force (“I was excited, thinking, ‘I’m going to solve a murder case!’”). Grainger was so immersed in this on-the-beat experience that she “didn’t want to let it go”, and yet being at Hendon failed to match her expectations. “What shocked me was just how corporate it felt, this open-plan office with all this hot-desking was quite business-like,” she says. “I found it really interesting that as you get higher up in the ranks, the more like a CEO you become.”

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