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LD Trivia: In addition to Nana Visitor and Armin Shimerman, they also got Morn's original voice actor to reprise his role for "Hear All, Trust Nothing"
(startrek.website)
It's fortunate they got him to agree to a flat fee rather than per word or the episode would have been way over budget.
Did Morn lose his last hairs since DS9 ended? That latinum poisoning really ages a Lurian.