Prodigal Son - Alma Mater

"Alma Mater" sends Malcolm (Tom Payne) back to the boarding school where he attempted to remake himself to help solve the murder of the headmaster who expelled him. The episode presents three cheating students (Lily Ganser, Arthur Langlie, and Salena Qureshi) with obvious motive not only for the crime but the prankish presentation of the body, although a late redirect works as a red herring. It also allows Malcolm to revisit the cause of a vicious attack he suffered as a student and raise questions about what led to a traumatic event that followed. The episode is most notable for flashbacks which reveal the source of Malcolm's hand tremor, which has been a staple of the show, while also highlighting the similarities and differences between Malcolm and his father. Speaking of dear old dad, the Surgeon's (Michael Sheen) plans on escape take one giant step forward thanks to the help of one of his fellow inmates.