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Planet Comics #42
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"Slave of the Hydra" delivers a classic pulp sci-fi thrill from 1946, where Dr. Grey’s defiance of Mysta ignites a dangerous transformation after a radioactive explosion. Written by Ross Gallun and illustrated by Fran Hopper, this issue blends early atomic-age anxiety with a chilling personal vendetta, all wrapped in Joe Doolin’s striking cover art.
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When Mysta forbids Dr. Grey from continuing his atomic research, he defies her. However, an accidental explosion renders him radioactive and he plans to use his new power to kill Mysta and destroy the moon.
Plot details indexed by the Grand Comics Database (CC BY-SA).
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