Mr. Cantwell is a teacher in the local school (albeit a not-so-good one) and holds a not-so-secret affection towards Miss Fahy. He first appears in the second episode, entitled "The Date", when his affection for Miss Fahy meets competition in the newly arrived film maker Dieter. Ever since Miss Fahy and Dieter got married, Cantwell is usually to be found in a depressed state over something or other, as the light has left his life. Cantwell appears as a caring person towards Miss Fahy but when it turns to school children, he's not short of insults for them!