Bonus: Poldark Writer Debbie Horsfield Looks To Fifth And Final Season

*Warning: This episode contains spoilers for Season Four of *Poldark. Debbie Horsfield, the executive producer and sole writer of MASTERPIECE’s Poldark , is ready for the fifth and final season of her series. After the drama and sorrow of the series’ fourth season, she offers some hopeful hints about the story still to come.