Meanwhile, Batman grows more wary of Dr. Disparu's experiments. In an effort to unravel the riddles of the Outback (and Disparu), Batman seeks out Julie Winters... and they both enter a dimensional hole leading to the Outback-where they encounter an alternate version of Harley Quinn! Back in the real world, Joker, Harley, and the Penguin are the current subjects of Disparu's experiments-experiments that have a decidedly bad reaction on the Maxx!

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