500715 002 White Elephant was 511028 White Elephant. The 500715 ep opens with a Wheaties commercial, and the 511028 ep mentions a magazine coming out in November.
500708 Just a Number is the audition program 50-04-19. Neither RGI nor Jerry show the first show as surviving. If you listen to the posted audition show and the show listed as episode #1 you can hear they are the same show. Also since episodes 2 through 4 are sponsored by Wheaties, you would expect to hear a Wheaties commercial in episode #1.
500902 009 Play For Keeps should mention at the end of the show that the Dennis Day show is 5 weeks away. Otherwise it is the 511014 show.
500923 012 Open and Shut is a duplicate of 511111 Open and Shut, if at the end of the show they ask you to listen to the "AGE OF INNOCENCE" on "THEATER GUILD ON THE AIR" later that night.
510128 (29) Night Chase was 52-01-27 (listen for a commercial for the Theatre Guild On The Air airing of The Thief). 510128's episode title is unknown.