Clark and Lois are assigned to interview Lois' uncle, meteorologist Horace Morton, at his observatory outside the town of New Birmingham. Morton has an uncanny ability to predict the weather with near-perfect accuracy, and Perry White wants to know how.
However, there is apparently also a connection between Dr. Morton's predictions and a crime spree in New Birmingham. Morton's assistant Elmer Rogers knows something but is afraid to let Clark and Lois know what he knows in Morton's presence. Then, during a freak hailstorm, Lois and Clark hear a gunshot, and discover Rogers dead . . .
Episode 54: Horace Morton's Weather Machine, Part 3 (1940/06/14)
Clark and Lois examine the body of Elmer Rogers, and Clark finds the gun that was used to shoot him. Just then, Dr. Morton comes in. He behaves quite erratically: he suggests that the fatal wound was self-inflicted, and despite Clark's warning he picks up the gun and examines it as if tampering with a crime scene is the most normal thing in the world. When Clark tells him to call the police, he questions whether they need to be involved.