Waterloo Road is back, and the arrival of dynamic new head teacher Karen Fisher, played by Amanda Burton, heralds a fresh start for the school. Opinionated and ambitious, Karen is determined to bring change, making Waterloo Road a safe and vibrant place to learn. However, her steely exterior masks a deeper fragility as she and her family wrestle with a recent tragedy. Karen's first challenge at the school arrives in the form of the Kirbys – sixth-former Jonah and 13-year-old genius Ruth - who have both been home-schooled by their father, Marcus. Marcus's ex-wife, Hannah, wants her children to experience mainstream schooling, but he has little faith in the state education system. Elsewhere, Chris discovers that the girl he slept with is one of his pupils - and Karen's daughter. William Ash, Linzey Cocker and Wil Johnson also star. Continues tomorrow.