I finished watching the second season of ADVENTURES OF SUPERMAN today. The final episode is called "Around the World with Superman" (written by Jackson Gillis) and I was astonished to find this had the same plot as "The Girl Who Didn't Believe in Superman" by Bill Finger, Wayne Boring and Stan Kaye from SUPERMAN No. 96 (March 1955). I first read that story when it was reprinted in SUPERMAN 242 (September 1971).
You would think that the comic book story came first, but in fact episode 26 of season 2 aired on March 13th, 1954; while SUPERMAN 96 went on sale January 25th, 1955. So it seems like the TV show had the idea first. Of course, Mort Weisinger was the story editor for all the TV episodes and he was the editor of the SUPERMAN comic book--so the idea was probably his either way.
I was an emotional wreck after watching the TV episode. It just touched me in a profound way. I think this is the idea of Superman--as corny as it may seem--that a lot of people identified with back in the day. It's that vital element that so many movies and other TV shows try to approach yet flinch away from because it's too sentimental and sincere for them to handle.