This is the first of six documentaries that take an intimate look at the policing of a community and the daily pressures experienced by the Brighton Police Department's emergency response unit, which prioritizes emergency calls. On this episode, Sergeant Richard Siggs is called to the scene of a stabbing.

"Newly minted PI Emma Holmes and her partner Sam Collins are just settling into their business when they're chosen for a high-profile case: retired music-hall star Verity Malone hires them to find out who poisoned her husband, a theater impresario. Verity herself has been accused of the crime. The only hitch? The Brighton police are already on the case, putting Emma in direct competition with her husband, police superintendent Edgar Stephens. Soon...