Nick fears Maya is getting close to discovering his secret and is forced to tell a devastating lie to protect himself. Maya continues her search for the missing witness and Julia makes a discovery.

Cast: Sophie Okonedo, Adrian Lester, Daniel Ezra, Shannon Hayes, Vincent Regan, Simon Tcherniak, Oliver Dimsdale, Tamara Lawrance, Derek Riddell, Mark Bonnar, Alistair Petrie, Danny Webb, Angel Coulby, David Schofield, Cecilia Noble