Line of Duty is a British police procedural and serial drama created by Jed Mercurio and produced by World Productions for the British Broadcasting Corporation (BBC). It first began broadcasting on BBC Two on 26 June 2012. The programme performed well and was quickly commissioned for additional series that aired in 2014 and 2016. After becoming the highest-rated series on BBC Two in 10 years, Line of Duty was promoted to BBC One beginning with the fourth series in 2017 and fifth in 2019, securing commissions through a sixth series, which concluded on 2 May 2021, after the programme had aired a total of 36 episodes.

Gerald Gary "Jed" Mercurio is a British television writer, producer, director and novelist. A former hospital doctor and Royal Air Force officer, Mercurio has been ranked among UK television's leading writers. In 2017, Mercurio was awarded a Fellowship of the Royal Television Society and the Baird Medal by RTS Midlands.