Britannia

Gen. Aulus Plautius leads an army of Roman invaders into Britannia; the invasion is foreseen by rogue Druid Divis, who finds an unlikely ally in young Celt girl Cait.

King Pellenor is convinced his people can destroy the Romans using force, but Kerra seeks an alternative approach; Cait struggles to connect with Divis and is soon left to fend for herself; an attempted mutiny goes wrong; Aulus finds an ally.

Aulus returns from his visit to the Underworld; Pellenor is furious to learn of Kerra's secret visit to the Romans; Divis persuades two Romans to get him into the enemy camp; Cait reunites with Divis to provoke a change in plans.

Veran leads his troupe of Druids to Crugdunon Fortress to deliver judgement to Kerra; events take an unexpected turn, leading to a new order for the Regni; Cait makes a confession to her father; Aulus punishes the Roman mutineers.

When Kerra is given a deadline to make a decision, Lindon offers her an alternative path; Phelan struggles to come to terms with the recent events, while Amenda spirals down a self-destructive path. Aulus visits Queen Antedia of the Regni.

Divis receives a deadly mission; Kerra adjusts to her new role as vendettas are plotted against her; Cait and her father find peace at Crugdunon, but it is short-lived; Aulus agrees to talk with Kerra but is sidetracked by a personal mission.

Camped out in a deserted village, Phelan is not convinced by Ania's confidence in her prophecy; Cait and Sawyer find solace, but it is cut short when Divis' demon Pwykka tracks them down; Roman deserters contemplate the gods.

The Cantii are still under siege from the Regni; Antedia uses a spy to her advantage; Aulus, sidetracked by a personal mission, tasks three sets of assassins to track down Cait; Lucius' mistrust of Aulus grows and his actions have fatal consequences.

Divis tries to track down the abducted Cait; the siege of the Cantii reaches a bitter and violent end; Phelan and Ania seek answers from Druid Veran, who considers the hope that is left for them in the form of Cait.

Two years after the invasion, a dead man awakens who could spell the end of everything.

The Dead Man sends Hella on a mission. Phelan's new life comes crashing down and Rork's suspicions about Veran lead him into a duel.

Veran gives Ania a terrible choice. Harka brings Phelan under his spell and the next stage of Cait and Divis's prophecy begins.

Hella makes Aulus an offer she knows he can't resist. Phelan fulfils his mission and Cait and Divis's dreams spell new danger.

A dream causes tension between Cait and Divis. Harka sends Love on a heart-breaking mission and Veran commits the ultimate betrayal.

Philo and Brutus play a prank, but their timing couldn't be worse. Harka sends Veran a message.

Vitus returns with a message for Aulus. Ania is placed in an impossible situation and The Traveller tracks down Lucius.

Aulus outrages Domitius with a confession and Andra discovers the truth about her family. Divis tries to use his powers on Love.

Divis gets one last chance to prove himself. Meanwhile, Cait's newfound happiness is cut short as Phelan tries to right his wrongs.

Veran and Harka face each other in a challenge only one of them can survive. Cait is forced to face her destiny. Series finale.

Aulus has built himself a smart villa overlooking the new town of Verulamium. But underneath, Druids and Celtic tribes still resist power.

Aulus struggles to remain in control now that Hemple is on the scene. The Druids are splintered by the betrayal of the Chosen One.

Aulus hears Widicus's concerns about the behaviour of the new arrivals. Cait and Antedia continue their partnership.

Aulus returns from his trip to the Underworld. Willa reveals that if Cait secures the Spear of The Silver Dawn then the tribes will be united.

Cait and her band of travellers strike a deal with Hella. Still under Hemple's hex, Ania returns and leads the gang on a dangerous path.

Cait is shocked by the revelation that a traitor is in their midst. Hemple, still with Amena at the Villa, plans another feast to satisfy Lokka's hunger.

Cait and her band continue their quest to reach Lucius because of his knowledge of the Spear. Hemple is furious that Veran seems to have got the better of her.

Still searching for Lucius and his knowledge of the Spear, Cait takes the fight to the redoubt, and to all those who are waiting for her.