Guest Stars Milo Callaghan as Alan K. Sullivan Callie Cooke as Lindy Pepper-Bean Eilidh Loan as Cooper Mercy Tom Rhys Harries as Ricky September Pete MacHale as Gothic Paul Jack Forsyth-Noble as Weatherman Will Niamh Lynch as Hoochy Pie Max Boast as Dr Pee Susan Twist as Penny Pepper-Bean Millie Kent as Valerie Nook 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 Suzie Pentecost Jamie Barnard as Brewster Cavendish