Marcella receives an anonymous package. At Jessie's vigil, DCI Sangha spots an eerily familiar face. Finn finds out who sold Jessie the heroin.

Cast: Ray Panthaki, Hugo Speer, Aaron McCusker, Laurence Kinlan, Anna Friel, Amanda Burton, Michael Colgan, James Martin, Ciaran Flynn, Valerie Lilley, Eugene O'Hare, Kelly Gough, Martin McCann, Mark Aiken, Jorin Cooke