Hetty Wainthropp Investigates

S00E01104 min· aired 5/30/1990
Missing Persons (ITV Movie Pilot)
TMDb4.5
Overview
During a visit to childhood friend Edith, retired housewife Hetty Wainthropp discovers that her husband, Frank, has a son by a previous marriage. Hetty decides to turn amateur detective to trace him. When this gives her a taste for detection, Hetty decides to set up a private detective agency.