
http://otrrlibrary.org/
Dick Tracy, famous detective, who solves every mystery put infront of him.
http://otrrlibrary.org/
OTR Library also lists some great programs such as Boston Blackie, Sherlock Holmes, and others, http://otrrlibrary.org/
My current favorite is the Sam Spade character that is made famous in the Maltese Falcon ( I even listened to the corresponding radio play)
http://otrarchive.blogspot.com/2009/04/adventures-of-sam-spade-otrr-certified.html
My final tip is that you should look at archive.org to find any of the classics, they are generally posted there. one, they are out of copyright, and two, there are great fans.
have fun with Old Time Radio (OTR)