Each program started the same way, with the announcer appearing to let us in to a secret. “He’s walking in to that drugstore . He’s stepping on to the scales.” The sound of a coin dropping, and then a mechanical voice: “weight 237 pounds. Fortune: danger.” The music rises then fades. “Who is it? The Fat Man!”
Incidentally, Jack Scott Smart did himself at the time of the series weigh in at 270 pounds!
Unfortunately there are only about 12 of the US version still available. The others that you will hear on RUSC are the Australian version I think there are about 40 of these. They are superb quality but I'm uncertain who the star was. It may have been Lloyd Berrell, but I can't be sure. Wiki search showed the following:
"There was also an Australian version of The Fat Man, which premiered on the Australian Broadcasting Corporation on September 9, 1954 and ran through 1955 for a total of 52 episodes. It was later syndicated by the Artansa label, and 36 episodes remain in circulation today. The role of Brad Runyon was played in this version by Lloyd Berrell." Source Wikipedia