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.

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

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.