Edna May Oliver’s depiction of the precise and unsentimental schoolteacher "Miss Withers" evokes Miss Marple. The appearance of some fish in the aquarium where the police find the body of the generally unpopular "Parker" is unsettling, though. It's revealed that his wife (Mae Clarke) is having an affair with a man (Donald Cook), and they were both there when he died. This seems like an easy case for "Insp. Piper" (Ja…