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 Tanya Reynolds as Lily Iglehart Patricia Allison as Ola Nyman Mikael Persbrandt as Jakob Nyman Co Starring Jim Howick as Mr. Hendricks Rakhee Thakrar as Miss Sands Lisa Palfrey as Cynthia Joe Wilkinson as Jeffrey Deobia Oparei as Mr. Effiong Lily Newmark as Ruthie Alice Hewkin as Tanya