TV adaptation of the play set in a Cambridge School of English for Foreigners in 1962. St John Quartermaine is a rather ineffective but kindly teacher at the school who, becuase of his gentle character, has hardly any enemies - in fact, the rest of the staff confide in him or generally pplay on his good nature. Then Derek Meadle arrives on the scene. He is a new part-time teacher who really wants to be full-time, but people like Quartermaine are in the way.
Two separate people, a man and a woman, find something very stirring about the sea turtles in their tank at the London Zoo. They meet and form an odd, but sympathetic camaraderie as they plan to steal two of the turtles and free them into the ocean.
A series of vignettes exposing how women manipulate their men into submission.