The Sins Of The Father Taking place after the No Man's Land story arc, Lonnie Machin decides to finally confront his supposed biological parents to uncover the truth of his lineage.
He first meets with his alleged biological mother, Greta Mitchell, but finds that she is mentally unbalanced, due to the side effects of Joker venom she was exposed to years earlier. In a flashback, she tells the story of how she became pregnant by the Joker, and that due to her condition she was deemed unfit for parental responsibility and that her child was taken away from her. However, Lonnie is unable to get any more information from her.
As a final recourse, Anarky breaks into Arkham Asylum using his teleporter and confronts his alleged father, now revealed to be the Joker. Meanwhile the Joker is in the midst of a prison break with other inmates, and takes advantage of the situation to steal the teleporter, and then forces Anarky to participate. Unarmed, Anarky plays along until he manages to regain the teleporter to escape, without the Joker having given him any clear answers either. Although the story presents no evidence, Anarky asserts that he personally believes the Joker is his father, and fears that someday he may become insane as well.
