:The Jack of Hearts in its most usual sense is a playing card. For the 1919 film, see The Jack of Hearts.
Jack of Hearts (Jack Hart) is a fictional character, a superhero in the Marvel Comics universe.
Jack of Hearts first appeared in Deadly Hands of Kung Fu #22 (March, 1976), and was created by writer Bill Mantlo and illustrator Keith Giffen.
Jack Hart was born in New Haven, Connecticut. He is the son of Philip Hart, a scientist who created an energy source called "zero fluid", and Marie, an alien humanoid woman of the Contraxian race. After being exposed to a vat of zero fluid, Jack underwent a mutagenic change and gained the ability to project concussive energy from his body. After gaining these powers, Jack began his mission of vengeance against the Corporation that killed his father. This led to Jack fighting other superheroes such as the Sons of the Tiger and the Hulk. He also fought the White Tiger. Eventually, he killed Stryke, his father's killer.
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