Barnes and the counterterrorism unit are caught in a race against time to foil the imminent terror attacks, but their challenge is made greater still as Mona and Danny are still held hostage.

Cast: Ky Discala, Archie Panjabi, Dorothy Atkinson, Shabana Azmi, Joe Blakemore, Hannah Bourne, Navin Chowdhry, Jack Davenport, Shanti Deen-Ellis, Sope Dirisu, Farzana Dua Elahe, Michael Ford, Hal Fowler, Elie Haddad, Tim Ingall