Joker and Harley Quinn kidnapped his successor Tim Drake, then Robin, while he was on patrol, inflicting three weeks of torture and brainwashing on him at the abandoned Arkham Asylum to learn Batman's secrets. When Batman and Batgirl found Tim, he was altered by the Joker's chemicals to match him, albeit as a miniature version. A fight ensued, during which Tim turned on and killed the Joker, suffering a complete nervous breakdown, while Harley fell down a ravine and was presumed dead. After he recovered a year later with help from Wayne family friend, Dr. Leslie Thompkins, Tim was forced into retirement by Bruce who blamed himself for the whole ordeal, severing his ties with the latter and left to make it on his own in life. Terry visits Tim, who voices bitterness towards his past as Robin but denies any involvement in the Joker's return. Terry's next suspect is Jordan Pryce, a Wayne Enterprises executive who hates Bruce for ruining his chance to take over Wayne Enterprises, but he only finds Pryce guilty of conspiring with the Jokerz to have Bruce killed. When the beam of a directed-energy weapon strikes Pryce's yacht from above, Terry rescues Pryce before turning him in to the police. In the Batcave, after realizing the Joker only destroyed the Robin costume, Terry recalls Tim's grudge against his old persona and deduces he must be involved; cross-referencing Tim's expertise as a telecommunications engineer with the Jokerz' thefts, Terry and Bruce discover the stolen equipment can create a jamming system to seize control of a laser-armed military satellite. When Terry goes to face Tim, he triggers a trap set by the Joker, who he then follows to an abandoned candy factory after surviving further attacks from the satellite. Subduing the Jokerz with Ace's help, Terry confronts the Joker, who gloats he encoded himself into a microchip built with genetic technology hidden behind Tim's ear—allowing him to survive his death by turning Tim into the Joker's host, who is on the verge of completely taking over Tim. With the satellite, the Joker plans to kill Bruce and Terry's loved ones before destroying Gotham City. As they battle, Terry uses one of the Joker's joy buzzers to destroy both the weapon and the microchip, saving the city and freeing Tim as the Joker finally meets his end. Following the Jokerz' arrests, Barbara hides Tim's unwitting involvement to protect