Livia must reassert control of the family. News from Germany has devastating consequences.

Drusus and Antonina’s wedding is threatened. Livia’s marriage is tested.

Livia and Gemina come face to face with life-changing consequences. Drusus’ military career is in danger.

Livia’s missed in Rome, and must deal with a threat to her sons and secure Gaius’ forgiveness.

Gaius’ plans for the succession shock Livia. Tiberius grows suspicious of Gaius.

Shocking news brings instability to Rome. Livia must make a dangerous choice.

Livia is threatened on her way to a wedding and has to make a life-threatening decision.

Ignoring Secret Service warnings, Perez and Tosh track down Mathias Soderland. Back on Shetland, a beach memorial service is held for Sally McColl.

Perez must re-assess the investigation in the aftermath of the attack. The MIT arrives on Shetland and sets its sights on Malone. Meanwhile, Tosh begins to have doubts about Lars.