Guest Stars Orla Mullan as DS Roz MacFarlene Jorin Cooke as Conor Scott Ciaran Flynn as Aaron Armstrong Valerie Lilley as Megan Healy Emily Flain as Jessie Healy James Martin as Danny Armstrong Shaniqua Okwok as Alanah Nigel O'Neill as Driver Michael Shea as Ryan Colley Jim Dornan as Deputy Chief Constable Carol Moore as Naomi Cairney