"The Crystal Armageddon!", Batman and Ra's Al Ghul have to work together in order to find Professor Hatter, whose crystal formula can crystalize all other matter; When the League of Assassins kill the Professor's brother, Hatter is overcome by sorrow and vows to destroy the world with his formula; The trail leads to a junk outside the coast of Hong Kong, where Batman and Ra's Al Ghul are able to neutralize the effect of the formula by spraying themselves and the sea with silicone.
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