The Flash

A Silver Age gem with a fascinating origin story, this version of The Flash made their first appearance in Challengers of the Unknown #18 in 1961, courtesy of creators Dave Wood and Bob Brown — and has been part of the DC universe ever since, with a publishing history stretching across an impressive six-plus decades. Sharing pages with heavy hitters like Batman, Superman, Green Lantern, Bruce Wayne, and Robin, The Flash here keeps genuinely elite company, popping up most frequently in Batman and Adventures of Superman. With a key issue among their appearances and 20 catalog entries spanning from 1961 to 2024, this is a character whose quiet persistence across the DC landscape makes them a rewarding discovery for the dedicated collector digging deeper than the obvious headliners.