Mystery, adventure, and international intrigue surround Ken Thurston, The Man Called X! Radio's most enduring cloak-and-dagger drama presents suave stage and screen star Herbert Marshall in sixteen tales of globetrotting espionage! Announcer John McIntire tells of the man "who crosses the ocean as readily as you or I cross town." Leon Belasco co-stars as Pegon Zellschmidt, with a supporting cast that includes Ge Ge Pearson, Steven Geray, Ted von Eltz, Frank Graham, Alan Reed, Cathy Lewis, William Conrad, and more.

Episodes include: Stolen Diamonds 11-25-44; A Case of Osculation 07-23-46; Antarctic Expedition 04-03-47; Acme Oil Refinery 04-17-47; Mr. Messler and The Insurance Policy 04-24-47; Swindle To Honolulu 06-05-47; Assignment - Naples 12-28-47; Spot The Eight Ball 01-04-48; Spirit of The Snows 01-11-48; Ranee of Shalakar 01-18-48; Race Against Death 04-21-51; Terror Across The Nation 04-28-51; Monte Carlo 05-04-51; The Maverick Steer 04-22-52; Cholera Epidemic 04-29-52; The Desert of Death 05-06-52