Harris' television credits include serial killer Ian Brady, on ITV1's television mini-series, , the 2007 television films hi Wedding Belles, Channel 4's drama series Cape Wrath as Gordon Ormond and the BBC series Ashes to Ashes as Arthur Layton. In 2009, he played corrupt Detective Inspector Bob Craven in Channel 4's critically acclaimed Red Riding trilogy and as photographer Anton Blair in Dean Cavanagh's comedy series, Svengali. In the BBC TV drama Five Daughters, Harris portrayed Brian Tobin, co-founder of the drug treatment facility, The Iceni Project, based in Suffolk. In preparing to play Tobin, Harris followed the real Brian Tobin around during pre-production. From 2011 to 2013, Harris appeared as the assassin Micheletto in The Borgias, a series created by Neil Jordan. In 2013, he starred as Stephen Morton in the Channel 4 drama Southcliffe, for which Harris would win a British Academy of Film and Television Arts award for Best Actor in 2014. He also played Joss Merlyn in the BBC adaptation of Jamaica Inn
Film
Harris played the main cast role of Thomas the Disciple, and later Thomas the Apostle in the 1999 biblical, historical, drama television film version of Jesus. His notable roles include that of Joy Division's lead singer Ian Curtis in Michael Winterbottom's 2002 film 24 Hour Party People and as Steven in the film short True Love , directed by Kevin Thomas. The film won Best Short Film at both the Palm Springs and Houston Film Festivals, was selected for the Clermont-Ferrand, London Raindance and Los Angeles Short Film festivals and also qualified for an Oscar nomination in 2004. Harris also played Nick Sidney in the 2005 mockumentaryBrothers of the Head, directed by Keith Fulton and Louis Pepe. In 2007, he appeared in his first feature film lead role as Eddie in Saxon, directed by Greg Loftin. In 2009, he played Stretch in Harry Brown, directed by Daniel Barber. In 2010, Harris appeared in another film short, Native Son, written and directed by Scottish director Scott Graham. It premiered at the 2010 Cannes Film Festival. In 2012, he played Fifield in Ridley Scott's Prometheus. In 2014, Harris played Mick Santino in Deliver Us From Evil, directed by Scott Derrickson and based upon the 2001 novel "Beware the Night" by Ralph Sarchie and Lisa Collier Cool. He was cast by Derrickson for the film, without an interview, based upon the director having seen the actor's performance in Harry Brown. That same year, he appeared as Gene Womack in Guy Myhill's The Goob. Myhill previously directed Harris in two film shorts, Two Halftimes to Hell and The Fabulous Bilsons. Harris finished the year with his performances as Captain Sandy Browning in the critically acclaimed 71, directed by Yann Demange, for which he earned a British Independent Film Award nomination for Best Supporting Actor and as Campbell in Serena, directed by Susanne Bier. In 2015, Harris appeared as Solomon Lane in , directed by Christopher McQuarrie, and as Macduff in Justin Kurzel's Macbeth. His next project, Trespass Against Us, was released in 2016. Harris filmed Possum'' in 2016, a film by Matthew Holness, in which he plays the main character. He reprised his role as Lane in the sequel '.
Music videos
Harris did a cameo appearance as a clown in a music video for the Norwich band the Black Sharks' debut album titled Lose Control, directed by Myhill. In 2007, he appeared in a video for Mark Ronson's "Stop Me". In 2012, Harris appeared in London-based music group Barbarossa's video short, Battles, directed by Montserrat Lombard. Harris and Lombard have been working on the screen play for a film short, White as well as a script for a feature-length film, Imager. He will play the lead in the film short with Lombard directing once again.
Personal life
Harris maintains a very private life. Known as an intense actor of Stanislavski's system, which allows him to film with few takes. He frequently remains unavailable for interviews while filming, preferring not to break with character.