Spiderman Death Bed

This must've been a common in theme in that time era, I also found the "doppelganger" scenario in the old superman cartoon, Mr t, and the Thundercats

Thanks for this info, 0.O. After reading your post, I looked into Superman twins, and found there was a 1963 DC issue for Superman Red / Superman Blue! I never knew. Very cool.

Yep, there was also another version called Bizarro superman 👍 like I said it seemed common theme back then, probably because it was around the same time the Twilight zone did the Dopplerganger episode