Guest Stars Callie Cooke as Lindy Pepper-Bean Tom Rhys Harries as Ricky September Pete MacHale as Gothic Paul Eilidh Loan as Cooper Mercy Susan Twist as Penny Pepper-Bean Millie Kent as Valerie Nook Milo Callaghan as Alan K. Sullivan Niamh Lynch as Hoochy Pie Max Boast as Dr Pee Jack Forsyth-Noble as Weatherman Will Aldous Ciokajlo Squire as Harry Tendency Billy Brayshaw as Blake Very Blue Elloise Bennett as Rotterdam Twin 1 Olivia Bennett as Rotterdam Twin 2 Ellie-Grace Cashin as Susie Pentecost Jamie Barnard as Brewster Cavendish