Kirk Langstrom is a scientist that was turned in a bat like creature after one of his experiments, being knows as Man-Bat. He later become one of the Batmans Greatest Enemies.

Doctor Langstrom made a serum that turn him into a Supervillain known as Man-Bat.

Man-Bat reappeared to Bruce during one of his nightmares, while he was walking around his family cemetary.

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