Today’s Mystery: After being knocked out, Johnny takes a helicoper to board a cruise ship that contains the stolen diamond. Original Radio Broadcast Dates: July 18, 19, and 20, 1956 Originating from Hollywood Stars: Bob Bailey as Johnny Dollar. Jeanne Tatum, Virginia Gregg, Harry Bartell, Chester Stratton, Marvin Miller, D. J. Thompson, Tom Hanley, Ray…