One-Punch Man
Season 1, Episode 8: The Deep Sea King
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A pack of monsters calling themselves the “Clan of the Seafolk” arrive on the shores of City J intent on invading the land. When the hero sent to fight them is defeated easily by the Deep Sea King himself, Saitama and Genos head for the city to help.
All Episodes - Season 1
Episode 1
The Strongest Man
Episode 2
The Lone Cyborg
Episode 3
The Obsessive Scientist
Episode 4
The Modern Ninja
Episode 5
The Ultimate Master
Episode 6
The Terrifying City
Episode 7
The Ultimate Disciple
Episode 8
The Deep Sea King
Episode 9
Unyielding Justice
Episode 10
Unparalleled Peril
Episode 11
The Dominator of the Universe
Episode 12
The Strongest Hero