Reflections of Murder (1974) (TV)

Director: John Badham
Cast: Ed Bernard, Joan Hackett, Lucille Benson, Michael Lerner, R. G. Armstrong, Sam Waterston, Tuesday Weld, William Turner

Synopsis:

The wife and mistress of the abusive headmaster of a boy’s school plot and carry out his murder. They dump his body in the murky swimming pool at the school and await for it to surface. After several days, some unusual circumstances point to clues that he is not dead after all.