#OnThisDay in 1972 #DoctorMoon debuted in #Batman #comics #240 #mercenarySurgeon employed by #RasAlGhul who #believedHeCouldAttainImmortalityByConnectingAHumanBrainToAComputer later #DrCyber sought his deft skills to #swapBrains w #WonderWoman eventually added #onStaff with #SuicideSquad