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Watch One-Punch Man

One-Punch Man

IMDB: 9/10AnimationComedy18+2015 - Present1 Season

Saitama is a hero who only became a hero for fun. After three years of “special” training, though, he’s become so strong that he’s practically invincible. In fact, he’s too strong—even his mightiest opponents are taken out with a single punch, and it turns out that being devastatingly powerful is actually kind of a bore. With his passion for being a hero lost along with his hair, yet still faced with new enemies every day, how much longer can he keep it going?

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Below you'll find every episode from the first season of One-Punch Man.
To see what is available free to watch, click the 'Episodes on Sources' tab above.

Season 1

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Watch undefined Season 01 Episode 01 The Strongest Man

S01 E01

The Strongest Man Oct 4, 2015

Saitama is a guy who’s a hero for fun. After saving a child from certain death, he decided to become a hero and trained hard for three years. Though he’s now so strong he can defeat any opponent with a single punch, lately he feels as if, in exchange for overwhelming power, he’s lost something even more important.

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Watch undefined Season 01 Episode 01 The Lone Cyborg

S01 E02

The Lone Cyborg Oct 11, 2015

A monster is moving toward City Z, one that has been created by the mysterious organization known as The House of Evolution. Genos, a young cyborg, attempts to stop it, but gets in over his head before Saitama happens along.

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Watch undefined Season 01 Episode 01 The Obsessive Scientist

S01 E03

The Obsessive Scientist Oct 18, 2015

Saitama and Genos glean information about The House of Evolution and its founder Dr. Genus, a scientist with dangerous ideas on artificial human evolution. Meanwhile, Dr. Genus learns of Saitama's amazing strength and has plans of his own for One-Punch Man.

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Watch undefined Season 01 Episode 01 The Modern Ninja

S01 E04

The Modern Ninja Oct 26, 2015

A group of battlesuit-clad terrorists called "The Paradisers" appears in City F, led by an enormous man known as Hammerhead. Calling for the redistribution of wealth, the group targets the fat-cat Zeniru, who in turn dispatches his bodyguard to defeat them. Unfortunately, Saitama is on the same errand.

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Watch undefined Season 01 Episode 01 The Ultimate Master

S01 E05

The Ultimate Master Nov 1, 2015

Though he's been doing the hero gig for three years, Saitama realizes that the public knows nothing about him. Determined to get a little recognition, he decides to become a pro hero, but first he must pass the Hero Association tests and become a full-fledged member.

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Watch undefined Season 01 Episode 01 The Terrifying City

S01 E06

The Terrifying City Nov 8, 2015

It's been five days since Saitama became a professional hero and he has yet to do anything heroic. When Genos informs him that C-class heroes who don't fight bad guys are dropped from the hero registry after a week of inaction, Saitama heads out on patrol, yet can't find any criminals or monsters to stop.

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Watch undefined Season 01 Episode 01 The Supreme Pupil

S01 E07

The Supreme Pupil Nov 15, 2015

An enormous meteor hurtles toward City Z, forcing the Hero Association to ask its S Class heroes to respond. When all their efforts prove in vain, Genos decides it's up to him to protect the home of his master and stop the meteor, no matter what the cost.

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