Eighteen months later, Marcella has a new life as a deep undercover operative in Belfast, spying on a powerful family that's running a shady business.

Cast: Anna Friel, Ray Panthaki, Michael Shea, Paul Kennedy, Emily Flain, Valerie Lilley, Nigel O'Neill, Martin McCann, Kelly Gough, Aaron McCusker, Amanda Burton, Michael Colgan, Jorin Cooke, Ciaran Flynn, Hugo Speer