Operation Redback ends as a nuclear meltdown allows Russia to carry out a "friendly invasion" of Scotland.

Shock when the Prime Minister loses the referendum. Beatrice tells William that she knows he was behind the Skanda bomb.

Beatrice now knows that Katrine is part of Redback. She confronts her, but Katrine has information that shocks Beatrice.

Beatrice fights against the clock to save the life of GRU activist Yelena Alekin. Torben Jensen, Katrine's missing girlfriend, is finally found.

Beatrice's father is arrested because he is suspected of being the Russian mole. Beatrice swears to prove his innocence.

A bomb planted by an agent under Beatrice's leadership kills eleven civilians. Meanwhile, William Adam is asking to resign as the number of yes votes for Scotland's independence increases.

It is revealed that Russian money is financing a Scottish terrorist group. Beatrice tracks down Oleg Adamov, the man who murdered her boss.

Beatrice and Katrine are working together to prevent an assassination of the Prime Minister. But can Beatrice trust Katrine?

Beatrice is given the task of leading a security group for the Prime Minister, as he is to meet a young woman. Has Beatrice been asked to help him have an affair?

MI5 agent Beatrice Ogilvie is being warned of an impending terrorist attack. Beatrice suspects that the Danish intelligence agent Katrine Poulson is involved and sets a trap for her.