'Line of Duty' had originally been conceived as a returnable drama, with the premise being that the fictional anticorruption unit AC-12 would move on to a new case in each series, centred on a high-profile antagonist accused of corruption.

In real constabularies, the relevant department that is the subject of 'Line of Duty' is called Professional Standards. However, 'Line of Duty' is set in a fictional anticorruption department, AC-12, in order to prevent any unintentional resemblance to actual units, cases, or individuals.

I have a lot of respect for our police forces. They are generally honest and effective.

Jed Mercurio Quotes