News of Ross and Demelza's marriage spreads, damaging Wheal Leisure's prospects.

George expands the Warleggan empire, launching a new ship and bankrupting Carnmore.

Dwight enlists in the navy to forget Caroline, and Demelza visits Verity to spend some time apart from Ross. While Ross considers rejoining his regiment, Elizabeth and George settle into married life, but George's plans provoke the locals to riot.

Ross Poldark returns home after American Revolutionary War and rebuilds his life with a new business venture, making new enemies and finding a new love where he least expects it.

As the election leads to rioting, Elizabeth goes to Bodmin herself. Demelza tries to influence the case by making a personal appeal to the judge, but George has a number of tricks up his sleeve as the day of the trial arrives.

An informant in the smuggling ring poses a serious threat to all, and George buys Ross's debt to finally crush him. Meanwhile, Caroline returns to Cornwall to make an announcement, but it is Elizabeth who reveals a great secret.

While George makes political manoeuvres at home, Ross sails to France to rescue Dwight from the French Revolution.

Rumours spread of a scandalous relationship between Ross and Demelza.

Needing money to open a mine free of George's influence, Ross strikes a deal with a local smuggler. Dwight, meanwhile, tries to diagnose an epidemic and receives help from an anonymous benefactor.

The Poldark family finds itself challenged on all fronts and threatened as never before.

Ross plans to reopen his family mine with Francis. Demelza struggles to fit in at Nampara.

Ross joins a smuggling trip in the Isles of Scilly in order to meet Mark Daniel but, in his absence, George moves in on Elizabeth. Caroline convinces Dwight they must elope for a new life in Bath, and Captain McNeil plans to ambush the smugglers on their return.

Ross and Dwight stand trial for their part in the smuggling. A new tin lode gives Ross renewed hope in Wheal Grace, but it is George who is there for Elizabeth when her mother falls ill and deals Ross a bitter blow.

Ross closes Wheal Grace for good. With Elizabeth wrestling with a life-changing decision, Demelza's world has been turned upside down. How will harmony be restored?

Ross and Demelza look to forget the past and rebuild their marriage, but new arrivals threaten their fragile reconciliation.

Drake finds himself in the Warleggans' firing line as George moves to secure his connection to the nobility, and Ross provides some local aid.

George pursues a vacant seat in Parliament as Agatha plans for her hundredth birthday, and Ross is given a proposition. Meanwhile, there is a new arrival at the Whitworth vicarage.

Joining the Enyses and Ross in London Demelza enjoys the city life and accompanies Ross to a charity ball thrown by Warleggan to celebrate his wife's pregnancy. Here she attracts Adderley's predatory attention, leading him to challenge Ross to a duel, the outcome of which makes Warleggan even more anxious to crush Ross. Whilst Demelza, overwhelmed by events, returns to Cornwall, Morwenna has a message for Drake and Geoffrey Charles makes an observation.

Demelza gives birth. Ross welcomes old friend Dr Dwight Enys to Cornwall.

Francis wrongly blames Ross for helping Verity elope with Andrew Blamey.

Ross prepares for his trial as Demelza and Elizabeth try to help his cause. George does everything in his power to harm Ross, Francis wrestles with his conscience, and Dwight clashes with an entitled heiress, Caroline Penvenen.

Ross and Demelza face financial ruin, and George plans revenge on Jud. Francis, meanwhile, tries to rebuild his life and extends an invitation to Ross and Demelza.

Ross tries to help Francis's family financially, but George calls in Ross's debt. Demelza toils loyally to protect all at Nampara, and Dwight and Caroline continue to meet in secret.

George proves merciless as the new magistrate, and Clowance is christened. Ross discovers the means to both help Dwight and combat Cornwall's famine.

Ross is adamant George will lose in the election and determines to get a headstone made for Agatha's grave, something Trenwith has neglected. George, meanwhile, questions Dwight over Valentine's legitimacy and - paranoid and jealous - shuts himself to Elizabeth, as Rowella begins to seduce Osborne Whitworth and Demelza receives tokens of Hugh's affection. Sam continues to pine after Emma, as Dwight instructs Osborne to forego intercourse with Morwenna and Cary informs Lord Falmouth that the Warleggans will be opposing Falmouth in the election. Ross returns from his mine to discover Hugh Armitage at Nampara with Demelza - and this time Hugh's attention does not go unnoticed..