A lively heroine arrives in Depression-era Yorkshire to shake up education at a school for girls, sparking conflict with a stern landowner. Anna Maxwell Martin, David Morrissey and Penelope Wilton star. Laura Linney hosts. As social improvements move forward in South Riding, Robert (David Morrissey) faces ruin after a principled stand against political corruption, and Sarah (Anna Maxwell Martin) confronts a crisis - both personal and professional. Penelope Wilton also stars.