The Met: Policing in London season 4: release date on BBC One, trailer and how to watch on BBC iPlayer

The Met: Policing in London is returning to BBC One for its fourth series. The popular documentary which goes behind the scenes of the UK's largest police force is back in a six-episode series.

Following on from its successful third season, this time it will follow police officers as they deal with life, death, crime and its victims all across London. The synopsis for the first two episodes in season 4 have already been shared by the BBC ahead of the new season. Both will cover the heavy topic of murder.

BBC Studios have also shared a 30-second trailer ahead of the season 4 release. So, when can you watch The Met: Policing London on BBC? Here's everything you need to know about the true crime documentary.

What is the release date for The Met season 4?

The Met season 4 will be available to watch on BBC One from Tuesday October 24 at 9 pm. Comprised of six episodes which will air in the same slot weekly, the first episode will follow detectives as they investigate the murder of a 17-year-old boy.

What is The Met: Policing in London about?

The Met: Policing in London is a documentary show that goes behind the scenes of the UK's biggest police force. Now in its fourth season, the six-part series follows police officers as they deal with crime and victims 24 hours a day.

The synopsis for the first two episodes in season 4 has been shared by the BBC ahead of the new season. Both will cover the heavy topic of murder.

Here is the plot for The Met: Policing in London season 4 episode one: "In Sydenham, south London, 17-year-old Levi Ernest-Morrison is stabbed outside his house. His mother Bonnie races to his aid, but he dies in her arms. Detectives from the Murder Investigation Team must track down those responsible.

"In Harrow, north west London, a young woman has gone to police and alleged that she has been threatened with violence and forced into sex work. Her case is investigated by the Met’s Modern Slavery Team.

"In Lambeth, south London, response officers Wes and Martha police the streets, while public confidence in the Met is at a record low. They respond to a call that schoolboys have been seen throwing fireworks, and that a man has been seen with a knife in a fast food restaurant."

Here is the plot for The Met: Policing in London episode 2: "22-year-old Agnes Akom has been reported missing, but what begins as a search for a missing person develops into something potentially far more serious. Agnes has not been seen for eight days and her usually extensive use of social media has stopped completely. As fears for her safety increase, her case is passed from local police to the Specialist Crime Unit who handle the Met’s most complex crimes.

"Agnes’ last known sighting is on Cricklewood High Street in north west London. CCTV from the area shows her getting into a silver car registered to a 66-year-old man, Neculai Paizan.

"Investigations into Paizan reveal he owns a storage container on an industrial estate, it is immediately searched, but Agnes is not there. However, detectives discover a CCTV camera pointing at the entrance to the container. As they begin watching footage from the day she disappeared, they make a worrying discovery, Agnes can be seen walking into the container with Paizan, but three hours later Paizan walks out alone.

"When Paizan is brought in for questioning, he admits going into the container with Agnes but claims they came out together 20 minutes later, directly contradicting the evidence from the CCTV. As forensic examination of the container reveals traces of blood, detectives must now try to discover where Agnes’ body is."

Is there a trailer?

Yes, BBC Studios have released a trailer for The Met: Policing in London. Lasting only 30 seconds it shares a short clip of what we can expect from season 4. You can watch it below.

Will The Met: Policing in London season 4 be on BBC iPlayer?

The Met: Policing in London season 4 will be available to watch on BBC iPlayer with episodes dropping on the streaming platform after they have aired on BBC One. All previous episodes from seasons 1 to 3 are available to watch on demand.