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The Best Episodes of One-Punch Man Season 1

Every episode of One-Punch Man Season 1 ranked from best to worst. Discover the Best Episodes of One-Punch Man Season 1!

Binge this in 4h 48mPeaking at 9.5/10

The most powerful superhero in the world can kill anyone with one blow. But nothing can challenge him, so he struggles with ennui and depression.

Seasons3

Episode Rankings

  1. #1 Fan Favorite
    One-Punch Man Season 1 Episode 1 - The Strongest Man
    8.4/10(7955 votes)

    #1 - The Strongest Man

    S1:E1

    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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  2. One-Punch Man Season 1 Episode 2 - The Lone Cyborg
    8.6/10(7196 votes)

    #2 - The Lone Cyborg

    S1:E2

    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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  3. One-Punch Man Season 1 Episode 3 - The Obsessive Scientist
    8.8/10(7167 votes)

    #3 - The Obsessive Scientist

    S1:E3

    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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  4. One-Punch Man Season 1 Episode 4 - The Modern Ninja
    8.5/10(6744 votes)

    #4 - The Modern Ninja

    S1:E4

    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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  5. One-Punch Man Season 1 Episode 5 - The Ultimate Master
    8.8/10(7157 votes)

    #5 - The Ultimate Master

    S1:E5

    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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  6. One-Punch Man Season 1 Episode 6 - The Terrifying City
    8.3/10(6556 votes)

    #6 - The Terrifying City

    S1:E6

    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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  8. One-Punch Man Season 1 Episode 7 - The Ultimate Disciple
    8.7/10(6706 votes)

    #7 - The Ultimate Disciple

    S1:E7

    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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  9. One-Punch Man Season 1 Episode 8 - The Deep Sea King
    8.8/10(6766 votes)

    #8 - The Deep Sea King

    S1:E8

    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.

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  10. One-Punch Man Season 1 Episode 9 - Unyielding Justice
    9.2/10(7993 votes)

    #9 - Unyielding Justice

    S1:E9

    As the battle with the Deep Sea King reaches its climax, more heroes fall to the aquatic despot’s brutal attacks. Which of them has what it takes to be a true hero?

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  11. One-Punch Man Season 1 Episode 10 - Unparalleled Peril
    8.6/10(6475 votes)

    #10 - Unparalleled Peril

    S1:E10

    Saitama tags along to an emergency meeting of Class S heroes and discovers that a seer has foretold a serious danger threatening the Earth. Though the crisis could occur anytime in the next six months, the heroes are surprised to hear the roar of explosions that very hour!

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  12. One-Punch Man Season 1 Episode 11 - The Dominator of the Universe
    9.1/10(7499 votes)

    #11 - The Dominator of the Universe

    S1:E11

    As a colossal spaceship floats in the skies above City A, a member of its monstrous crew battles on the ground against a group of S Class heroes. Despite their powers, they can’t seem to finish it off. Meanwhile, Saitama has boarded the enemy ship on his own.

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  13. One-Punch Man Season 1 Episode 12 - The Strongest Hero
    9.5/10(12047 votes)

    #12 - The Strongest Hero

    S1:E12

    The inconceivably powerful Lord Boros has traveled untold distances in search of someone who can cure his boredom: Saitama! With the fate of humanity in the balance, will the two champions at last find in each other the worthy opponent they’ve been searching for?

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Season 1 Ratings Summary

"The Strongest Man" is the best rated episode of "One-Punch Man" season 1. It scored 8.4/10 based on 7955 votes. Directed by Shingo Natsume and written by Tomohiro Suzuki, it aired on 10/5/2015. This episode is rated 0.2 points higher than the second-best, "The Lone Cyborg".