First Line of Duty season five trailer hints at some big reveals for the show

"Whatever it takes, I'm in"

BBC One's Line of Duty has been one of the most acclaimed British dramas of recent years, with viewers riveted to the investigations of AC-12, a controversial police anticorruption unit. The first trailer for the fifth season has just been released, and it is as intense as ever. https://youtu.be/53V-eVvWLoM There's yet more police corruption to be uncovered, this time centring around a hijacking of vehicle by armed men, and three police officers murdered in cold blood. We also get the first glimpse of Stephen Graham, the brilliant star of This Is England and Boardwalk Empire, who is joining the cast for the new season. He'll be playing the 'Balaclava Man' from season four. We also get hints at the identity of the mysterious 'H'. Martin Compston, Vicky McClure and Adrian Dunbar all return to reprise their roles. There is no release date yet set for season five of Line of Duty. https://twitter.com/BBCOne/status/1102203340597940224