Digger Harkness

Few Silver Age villains have proven as enduringly dangerous — or as darkly entertaining — as Digger Harkness, who first menaced DC's Scarlet Speedster in The Flash #117 back in 1960, courtesy of the legendary creative duo of John Broome and Carmine Infantino. Over 66 years and 111 catalogued appearances, this rough-edged rogue has grown far beyond his Flash-universe roots, becoming a fixture of Suicide Squad and crossing paths with some of DC's absolute heaviest hitters — Green Lantern, Batman, Superman, and Bruce Wayne among them. Six of his appearances carry key-issue status, a testament to how often he's landed at the center of genuinely consequential comics moments. Whether you're a Flash completist, a Suicide Squad devotee, or simply a fan of Silver Age villainy done with real staying power, Digger Harkness is a character whose six-decade track record demands your attention.