Cassidy (Mawdryn Undead)

A matron named Miss Cassidy (PROSE: Mawdryn Undead) worked at Brendon Public School.

Biography
In 1983, the matron looked after Vislor Turlough after he was injured in a car crash. She later informed the headmaster, Mr. Sellick, that Turlough had left the school's sickbay without permission. (TV: Mawdryn Undead)

The matron had a cat, which received a shock from which it never recovered when Daniel Hinton dabbled in black magic in 1992. (PROSE: Downtime)