In 2013, Coonan joined the cast of the BBC soap opera EastEnders, playing Carl White, having previously played David Priors in 2011. He was originally contracted to appear in 28 episodes as Carl over a six-month period, but filmed over 60 episodes. Coonan was axed from the show in September 2013 and departed in January 2014. Since leaving, Coonan has again returned to the stage, playing 'Marco' in Arthur Miller's classic play 'A View From the Bridge' at The Liverpool Playhouse and 'Black Dog' in The Royal National Theatre's 2015 production of 'Treasure Island'.
In 2016 Coonan appeared in the Discovery Channel miniseries Harley and the Davidsons playing william A. Davidson, one of the founders of the Harley Davidson motorcycle company. He will be involved in filming History Channel's eight part drama documentary 'The War on Drugs' in early 2017 as well as the BBC drama 'Hard Sun', created by Neil Cross, the Writer of 'Luther'.
