About this episode
*Warning: This episode contains spoilers for Episode One of Season Four of *Poldark. Debbie Horsfield is the only writer of every episode of MASTERPIECE’s Poldark , so she definitely knows what’s on the horizon in the series’ fourth season. Secrets, lies and parliamentary politics come to Cornwall in a big way this season. Horsfield — who is also one of the series' executive producers — offers a sneak preview of the surprises still to come, and reveals why Aidan Turner was always the only actor she would cast as Ross.