Guest Stars Ncuti Gatwa as Eric Effiong Emma Mackey as Maeve Wiley Connor Swindells as Adam Groff Aimee Lou Wood as Aimee Gibbs Kedar Williams Stirling as Jackson Marchetti Alistair Petrie as Headmaster Michael Groff Mimi Keene as Ruby Matthews Samantha Spiro as Maureen Groff Chinenye Ezeudu as Viv Odusanya George Robinson as Isaac Goodwin Dua Saleh as Cal Bowman Doreene Blackstock as Beatrice Effiong Thaddea Graham as Sarah "O" Owen Reda Elazouar as Beau Alexandra James as Aisha Hannah Gadsby as Celia Anna Francolini as Gloria Masters Felix Mufti as Roman Anthony Lexa as Abbi Montgomery Dan Levy as Thomas Molloy Marie Reuther as Ellen Rasmussen Imani Yahshua as Tyrone Joe Hewetson as Student James Jip as Chris Rose Reade as TBD