Guest Stars Raza Jaffrey as Jack Oliviera Oliver Chris as Guy Cavendish Abhin Galeya as Raz Farooqi Alexander Karim as Lars Nordström Julie Graham as Susan Fisher Dean Ridge as Simon Segman Elizabeth Dulau as Louise Pennycook Jennifer Macbeth as Tessa Joseph Aurora Jones as Maggie Cavendish Joe Thomas as Matt Malyon Carolin Stoltz as Brigitta Nordström Cheryl Mackie as Mrs. Williams Tareq Al-Jeddal as Callum Wares Darren Hart as Mr. Williams Naomi Yang as Mae Zhang Matilda Ziegler as Becky Hillford Nicola Stephenson as Debbie Wares Yazzmin Newell as Laura Harmony Raine Riley as Peggy Isabelle Smith as Jenny Thomason Rameet Rauli as Sobia Chris Jarman as Jim Eva Pope as Sally Thomason Sarah Belcher as Mrs. Appleby