A gang of six wealthy, well-dressed and well-spoken hoodlums break into a married couple's house and rape the wife while forcing the husband to watch. Thus begins a dogged investigation by a determined detective who quickly finds that their cult-like solidarity can be a serious obstacle to breaking them.

A new schoolteacher learns that the previous teacher was killed by his students, and he fears the same fate will befall him.

Please Sir! is a London Weekend Television produced situation comedy, created by writers John Esmonde and Bob Larbey and featured the actors John Alderton, Deryck Guyler, Joan Sanderson, Noel Howlett, Erik Chitty and Richard Davies. The series ran for 55 episodes between 1968 and 1972.