Slow Horses
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Slow Horses season 4 on Apple TV+ has viewers wondering if Slough House is a real MI5 branch. The British spy thriller is based on the bestselling Slough House series of novels by Mick Herron. Like the source material, the series centers on Slough House — the administrative purgatory for MI5 agents who've made career-ending missteps. Although these "slow horses" are relegated to drudgery, they get involved in high-profile cases, thanks in large part to the rude-yet-incisive veteran MI5 agent Jackson Lamb (Gary Oldman), who leads Slough House's team of well-meaning misfits.