The doctors are in with these four old time radio mysteries. A doctor hires Dick Powell and then jumps out of the window in\xa0Richard Diamond, Private Detective (originally aired on NBC on August 23, 1950). Joe Friday is on the trail of a phony physician in "The Big Quack" from\xa0Dragnet (originally aired on NBC on October 12, 1950). A crooked doctor sets up fake accidents in "No Insurance" from\xa0The FBI in Peace and War (AFRS rebroadcast from November 22, 1951). And Frank Sinatra comes to the aid of a doctor with a dilemma close to home in "Honor Among Thieves" from\xa0Rocky Fortune (originally aired on NBC on March 2, 1954).