Although he isn't credited as such, John Mills also plays the father of young William Perkins in the scenes at the boarding school.
Although John Mills is supposed to be younger than Anthony Steel, in reality he was more than a decade his senior.
The first of two appearances by Paul Spurrier, the other being in S4 E3, The Boy Who Talked with Animals (1981).
As of February 2021, this was the last on screen performance by 3 of the cast, Guy Humphries who played Stamford, Clifford Abrahams and Adrian Breeze, both of whom were Schoolboys in the dorm.
The first of three appearances by John Mills, the others being S2 E11, The Umbrella Man (1980), and S5 E3, Operation Safecrack (1982).