Signalman

Signalman is a minor DC villain who bases his crimes around signals, signs, and symbols — using traffic signals, semaphore, and other signaling systems as both his calling card and his criminal methodology, making him a recurring oddity in Batman's rogues' gallery.

A classic Silver Age schemer born from the imaginative minds of Edmond Hamilton and Dick Sprang, Signalman made his debut in Batman #112 back in 1957 and has been a persistent — if delightfully offbeat — presence in DC's rogues' gallery ever since. Turning up across nearly seven decades of comics, he's shared pages with heavyweights like Batman, Bruce Wayne, The Flash, and Green Lantern, which speaks to a reputation that reaches well beyond Gotham's city limits. His profile was cemented enough to earn an entry in Who's Who: The Definitive Directory of the DC Universe, the ultimate stamp of DC canon legitimacy, and he's popped up everywhere from Justice League of America to Batman '66. With a key-issue appearance to his name and that unmistakable Silver Age charm, Signalman is exactly the kind of colorful, deep-cut villain that makes DC's history such a rewarding place to explore.