Jeff Regan wasn't a lone wolf operator like other radio gumshoes; he reported to Anthony J. Lyon, head of the International Detective Bureau. Known throughout the city as "the Lyon's Eye," Regan worked cases sometimes in spite of the penny-pinching interference of his boss. We'll hear Jack Webb as Regan in "The Diamond Quartet" (originally aired on CBS on August 14, 1948) and "The Man Who Came Back" (originally aired on CBS on August 21, 1948). Then Frank Graham stars in "No Sad Clowns for Me" (originally aired on CBS on June 25, 1950).