Line of Duty series six has been focusing on the investigation into DCI Jo Davidson (played by Kelly Macdonald) and her leadership in the murder investigation of Gail Vela (Andi Osho). But while AC-12 have been looking deeper into corruption within the force, they came across Detective Superintendent Ian Buckells (Nigel Boyle). Unfortunately for him, Jo led Detective Superintendent Ted Hastings (Adrian Dunbar) and DI Steve Arnott (Martin Compston) straight to him.
WARNING: This article contains spoilers from Line of Duty.
Suspicion was surrounding DCI Davidson but she pointed out to DI Kate Fleming (Vicky McClure) some of Buckell's own activities.
He was the one who had Pc Ryan Pilkington (Gregory Piper) join MIU (Murder Investigation Unit) and when his car was searched, a laptop was found.
This was incriminating evidence as it was linked to the murder of journalist Gail Vela.
So AC-12 had no choice but to arrest Buckells who later witnessed the murder of lawyer Jimmy Lakewell (Patrick Baladi) who was lured to his cell for another inmate to strangle him from behind.
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Line of Duty: Who is Ian Buckells? (Image: BBC)
Line of Duty: Ian Buckells worked with Kate and Jo on the Murder Investigation Unit. (Image: BBC)
Buckells was in the first-ever series of Line of Duty as he was appointed the SIO in the case of the disappearance of Jackie Laverty.
Fans first meet Ryan Pilkington in this same series who not only gave DCI Tony Gates (Lennie James) the burner phones but also tried to cut off Steve's fingers with a pair of boltcutters.
As pointed out in series six, Buckells was the