From The Perry Mason TV Show Book (Revised)
Barbara Hale’s actor-husband Bill Williams makes another of his Mason series appearances in this cow-tale involving a murder.
A woman named Linda Blake arrives in the town of Ladera seeking her inheritance as the daughter of a man who was never married, and who died seven years before in a hunting accident. When someone tries to kill her by turning on the gas in her motel room, Linda goes to Perry, who happens to be in town on business.
Against Perry’s wishes, Linda keeps an appointment with a shady character at the local dairy. The man has arranged for an explosion to take place at the moo-juice palace; amazingly, the explosion does not kill Linda Blake. Instead, the shady character himself is discovered bludgeoned to death with a walking stick that can be linked to Linda.