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 Zachary Fall as French Agent / Laurent