The Slough House entrance from "Slow Horses"

The Slough House is a fictional MI5 office building in the "Slow Horses" television series on Apple TV. Those assigned to the Slough House are MI5 undesirables who have been assigned to career purgatory after bungling their job. They are known as Slow Horses.

The tv series stars Gary Oldman and Kristen Scott Thomas and is based off of the books by Mick Herron.