. . "Line of Duty is a drama about the investigations of AC-12, a controversial police anticorruption unit. Line of Duty originally aired on BBC Two from 2012-16, it was then moved to BBC One in 2017, the BBC have announced that they have commissioned for a fifth series to air in 2018, which will also air on BBC One."@en . . . . "Line of Duty"@en . "Line of Duty is a drama about the investigations of AC-12, a controversial police anticorruption unit. Line of Duty originally aired on BBC Two from 2012-16, it was then moved to BBC One in 2017, the BBC have announced that they have commissioned for a fifth series to air in 2018, which will also air on BBC One."@en .