Guest Stars Freddie Wise as Geoffrey Charles Amelia Clarkson as Rosina Hoblyn John Macneill as Jacka Hoblyn Oscar Novak as Jeremy Poldark Sofia Oxenham as Tess Tregidden Woody Norman as Valentine Warleggan Wensdae Gibbons as Clowance Poldark Anthony Calf as William Wickham Lily Dodsworth-Evans as Cecily Hanson Peter Forbes as Thomas Erskine Richard Dixon as Lord Ellenborough Sam Crane as Sir Spencer Percival Don Gallagher as Vicar William Sebag-Montefiore as Foreman of the Jury Daniel O'Keefe as Coldbath Prison Guard