Source: purch.com

1. Challengers of the Unknown

The Challengers of the Unknown are maybe the peak "silver age concept that can't catch on in the present".

A group of people, caught in a horrible plane crash, but emerging without a scratch on any of them. A Pilot, a scientist, a boxer, and a stuntman. Four men who escaped death. Four men living on borrowed time. Who decide to use that time to plunge into the mysteries of reality and go on some badass adventures.

Because if you escape death, why not use it for some purpose? Prof, Ace, Rocky, Red, and eventually, June, all fight giant monsters and investigate islands of mad science, operating as the normal people who like to"¦ challenge the unknown.