The series finale of Poldark (Season 5, Episode 8) concludes the period drama with Ross Poldark executing a dangerous spy mission against the French, ultimately thwarting an invasion with help from an unlikely alliance with George Warleggan. The episode resolves the central rivalries and character arcs, featuring a reconciliation between Ross and Demelza, and sets a hopeful, albeit bittersweet, tone for the future of the characters in Cornwall.