Marvel Database

David Stack (Earth-616)

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David Stack was a patient in the 'Mad Dog Ward' of a mental asylum who believed he was a superhero called Captain Zero. When Peter Parker was knocked out outside of the gates of the asylum, he was mistakenly thought to be one of the patients, stripped of his Spider-Man costume, and committed. Stack befriended Parker while he was in Mad Dog Ward.

After Civil War

After the Civil War, he was listed as a potential recruit for the Initiative.[1]

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