Mona returns to Britain and despite being injured, is determined to investigate whether Danny is linked to Islamic radicals but her efforts to get Danny to safety have consequences.

Cast: Archie Panjabi, Shabana Azmi, Navin Chowdhry, Enzo Cilenti, Jack Davenport, Shanti Deen-Ellis, Sope Dirisu, Farzana Dua Elahe, Jan Francis, Helen Iesha Goldthorpe, Elie Haddad, Shalisha James-Davis, Viveik Kalra, John Kamau, Munir Khairdin