#OnThisDay in 1958 #DoctorDoubleX debuted in @dc.com #DetectiveComics #261 #DrSimonEcks #passiveMindedScientist harnessed his #etherealHumanAura as #moreAggressiveDoppelgänger who strong-armed #TheDr & #Batman with #energyBlastsAndSuperStrength #RonPerlman voiced for #TheBraveAndBold #animatedSeries