“As one door is pushed shut by a grimy MI5 boss, another creaks open,” said Tim Glanfield in The Times . The fifth season of “Slow Horses” may be over “but that doesn’t mean it’s time to mothball your television” while you wait for your next Mick Herron instalment. Another of Herron’s books – this time, his debut novel – has been adapted for the small screen. And, if you’re a fan of the Slough House “outsiders” and their “battles against the system”, you’ll enjoy this new show.

The action kicks off in Oxford, where “bored art restorer” Sarah Tucker (Ruth Wilson) is hosting a dinner party with her financier husband for one of his “particularly important and irksome” clients. But the evening is “cut short” by a deadly gas explosion at a neighbouring house. When Sarah realises that an in

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