It’s been the question on the lips of Line of Duty fans for years: who is the bent copper known as “H”?
In episode four, viewers saw the imprisoned OCG lawyer Jimmy Lakewell (Patrick Baladi) talk to Arnott, who was attempting to get him to turn informant.
In season six, Osborne is using his power and influence to discredit the work of Hastings and AC-12.
Arnott was seen once again visiting Steph Corbett (Amy De Bhrún), the widow of slain undercover officer John Corbett (Stephen Graham).