The Flash #125 (1961)

In The Flash #125, the world as we know it is in jeopardy due to an alien invasion. The Flash and his protégé, Kid Flash, join forces to save humanity by going back in time to destroy a radiation-absorbing hive that renders atomic elements and weapons inert. Along the way, Kid Flash encounters giant creatures and battles giant bees while searching for the hive. Meanwhile, the Flash fights off the alien invaders in the future and gets captured by their leader. With the help of the resistance fighters and fully functional atomic pistols, the Flash is able to defeat the Dokris and save Earth. With atomic energy restored across history, everything is back to normal and the heroes can finally relax and enjoy a nice dinner. Trust us, this issue is a must-read for any comic book collector.