For seven years on radio, Jackie Kelk portrayed cub reporter and Superman's pal Jimmy Olsen, and he helped to define the character for generations of depictions in comics, cartoons, and films. We'll hear him in a pair of Suspense thrillers - first as a man who murders his brother to preserve their childhood home in "Shadow on the Wall" (originally aired on CBS on September 22, 1957), and then in a western drama as a young gunfighter out for revenge in "Sundown" (originally aired on CBS on May 4, 1958). Plus we'll hear him as Jimmy in "The Mystery of the Flying Monster" from The Adventures of Superman (originally aired on ABC on March 7, 1949).