Line of Duty fans are in for a treat after a new action-packed trailer dropped teasing the return of the hit cop drama.There’s guns, car crashes and cryptic clues to who might be the mysterious H anti-corruption officers have desperately been searching for throughout the popular BBC series.Season six, which returns on Sunday 21 March, is certainly not one to miss if these latest gripping scenes of the AC-12 team in action are anything to go by.Trio DI Kate Fleming (Vicky McClure), DI Steve Arnott (Martin Compston) and SI Ted Hastings (Adrian Dunbar) return to our screens later this month as they continue their crackdown on corrupt officers.And there’s also two coppers, DCI Joanne Davidson – played by Kelly MacDonald of Trainspotting fame -.
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