The Saint, a modern day Robin Hood was created by author Leslie Charteris and as the original Radio program's introduction said, he was: "known to millions from books, magazines, and motion pictures." Several versions of the program appeared on different networks.
The Saint began its life on radio in January 1945. Edgar Barrier starred, and Bromo-Seltzer was the sponsor. This version ended March 31, 1945. The second iteration of The Saint on radio was a summer replacement for the Jack Carson Show on CBS, the program went off when its summer run ended September 12, 1945. Brian Aherne starred, and Campbell Soups was the sponsor. The show's third version, which began July 9, 1947, was limited to CBS' West Coast network. It ended June 30, 1948. The sponsor was Lever Brothers. Vincent Price starred in this version and in most of the show's episodes in the two versions that followed.
After a year's hiatus, The Saint returned to radio July 10, 1949 - this time on Mutual. The show lasted through May 28, 1950. The program's final run began June 11, 1950, as a summer replacement for The Phil Harris-Alice Faye Show. The Saint was back on its original network, NBC, for this version, which ended October 14, 1951. The show lasted longer in this version than in any other.
The title role was also played briefly by Tom Conway (whose brother, George Sanders, had played Simon Templar in several films), and Barry Sullivan. Louise Arthur played Patricia Holm, Templar's assistant. Lawrence Dobkin played Louie, the cab driver. John Brown played Inspector Fernack, and Ken Christy played Hoppy, Templar's sidekick. (Source: wikipedia.org)