7.7/101,938 votes#1 - Episode 1
Season 1 Episode 1 - Aired 6/26/2012
When Steve Arnott is transferred to a police anti-corruption unit, he finds his target is the city's top detective, Tony Gates. Can Gates really be as good as he appears? Arnott must engage in a cat-and-mouse struggle to uncover Gates' secret.
Director: David Caffrey
Writer: Jed Mercurio
8.1/101,637 votes#2 - Episode 2
Season 1 Episode 2 - Aired 7/3/2012
Having been duped into covering up Jackie's crime, Gates is desperate to sever ties with her. But, as Arnott and Fleming close in on his secret, Gates is plunged into an even more dangerous situation than he first thought.
Director: David Caffrey
Writer: Jed Mercurio
8.0/101,560 votes#3 - Episode 3
Season 1 Episode 3 - Aired 7/10/2012
Arnott is convinced Gates played a part in Jackie's disappearance. With Fleming's help, the anti-corruption team tries to trap Gates into revealing his involvement in covering up Jackie's crimes.
Director: David Caffrey
Writer: Jed Mercurio
8.1/101,502 votes#4 - Episode 4
Season 1 Episode 4 - Aired 7/17/2012
Desperate for proof of Gates's corruption, Fleming pushes her relationship with him to the limit. But her behaviour causes Morton to question if she might not be such a loyal colleague after all.
Director: Douglas Mackinnon
Writer: Jed Mercurio
8.3/101,630 votes#5 - Episode 5
Season 1 Episode 5 - Aired 7/24/2012
With Gates on the run, the anti-corruption team come under pressure to close the case once and for all. Arnott is forced to make some tough decisions about where his loyalties lie. Fleming and Hastings go all out to catch Gates, leading to a shattering conclusion.
Director: Douglas Mackinnon
Writer: Jed Mercurio
Season 1 Ratings Summary
"Episode 1" is the best rated episode of "Line of Duty" season 1. It scored 7.7/10 based on 1938 votes. Directed by David Caffrey and written by Jed Mercurio, it aired on 6/26/2012. This episode is rated 0.4 points higher than the second-best, "Episode 2".