For the BBC's WEDNESDAY PLAY series, Dennis Potter offered one of his "visitation dramas": Housewife Cynthia Nicholls is married to prudish Richard Nicholls. One day, her mundane household chores are interrupted by the arrival on her front step of scruffy, coarse Michael Biddle. He claims to be an angel, but on the face of it, he could simply be a deranged street person. She challenges the angel Michael by pointing out that he has no wings.