Louisa is not best pleased when her new art teacher Erica wants to try out some rather alternative ideas on the children, while Dr Timoney is involved in a car accident outside the school. Penhale is confused when he is offered a transfer to Exeter, Bert decides to go back to being a handyman, and Louisa and Martin are intrigued when Dr Timoney invites them for an additional therapy session. Special Guest: Sigourney Weaver