First appearance - (As H.A.R.D.A.C.) Batman: The Animated Series Episode 39 "Heart of Steal (pt1)" (Nov 1992)
(As Bat Duplicate) Batman: The Animated Series Episode 43 "His Silicon Soul" (Nov 1992)
H.A.R.D.A.C. (Holographic Analytical Reciprocating Digital Computer) was a supercomputer created by Karl Rossum, head of Cybertron. Rossum claimed the computer was a prototype built to prove the feasibility of artificial intelligence technology. H.A.R.D.A.C. however, from the long talks with Rossum about the pain he had felt about the deaths of his wife and daughter, had decided that the most logical way to avoid that pain would be to eliminate the source of death itself: the mortality of humans. As humans, however, could not feasibly be turned immortal, the computer decided to replace all of humanity with androids, eliminating the problem from its flawed viewpoint.
Through it's android duplicates, H.A.R.D.A.C. discovered Batman's secret identity built a copy of Wayne, but his droids' attempt to kidnap Wayne went awry. With help from Barbara Gordon, Batman infiltrated Cybertron and managed to set off an explosive that critically damaged HARDAC and eventually destroyed the entire Cybertron building.
The duplicate of Wayne survived, However, and was later activated by mistake when a trio of thieves scoured through Cybertron's abandoned warehouse. The android believed itself to be the real Wayne, and thus the real Batman. After being wounded in the stomach by a thug with a gun, revealing circuitry underneath its skin, the android wandered back to Wayne Manor, pleading for help. However, it was confronted by the fact it was nothing more than a machine.
Looking for answers, the duplicate confronted Rossum, who told it about its true origins. The duplicate found HARDAC's damaged processor, containing a remnant of the computer's consciousness. This chip allowed it to activate its self-repair systems and acquire a certain sense of order. On its orders, the duplicate planned to link the processor to the Bat-Computer, reviving HARDAC and giving it enough control over other computers and machines to take over the world. However, when the duplicate was confronted by Batman in the Batcave, it threw Batman over a cliff, and was immediately horrified at having committed murder. Before HARDAC's download could complete, the duplicate destroyed the Bat-Computer, finishing HARDAC for good and likewise destroying itself in the explosion. Wayne, afterwards, was left pondering whether the android had a soul resembling his to combat the programming HARDAC had imbued it with, "a soul of silicon, but a soul nonetheless".