“Slow Horses” creator Will Smith says Slough House head Jackson Lamb (Gary Oldman) is a “walking backstory.” In the “Slow Horses” Season 5 finale, aptly titled “Scars,” viewers learn exactly what he ...

The fifth season of Slow Horses has come and gone, adapting another book in Mick Herron's successful Slough House series. This time around, it was the fifth book in the series, titled London Rules, ...