Joe's future in the Army hangs in the balance as Honor struggles to cope with the revelations about his past. Markham is torn between his duty and his conscience and Armstrong fears for Yusra's safety.

Cast: Essie Davis, Jessica Raine, Jessie Buckley, Stephen Campbell Moore, Ben Miles, Jeremy Neumark Jones, Tom Glynn-Carney, Ouidad Elma, Chris Reilly, Amanda Drew, Louis Greatorex, Richard Dillane, Kal Naga, Stuart Graham, Aymen Hamdouchi