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Ultimate Lifeform
s03e12 · 2025-12-28 · 14:45
What it is
One-Punch Man is a super hero who has trained so hard that his hair has fallen out, and who can overcome any enemy with one punch. However, because he is so strong, he has become bored and frustrated with winning all his battles so easily.
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Episode guide
13 this season · 37 totals01e01 The Strongest Man 2015-10-06 16:05
The Strongest Man
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.
s01e02 The Lone Cyborg 2015-10-13 16:05
The Lone Cyborg
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.
s01e03 The Obsessive Scientist 2015-10-20 16:05
The Obsessive Scientist
Saitama and Genos track down an evil scientist who wants to know the secret to Saitama's power.
s01e04 The Modern Ninja 2015-10-27 16:05
The Modern Ninja
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.
s01e05 The Ultimate Master 2015-11-03 16:05
The Ultimate Master
Saitama and Genos find out about the hero registration and both take the tests to certify. Genos gets "S(Special)" and Saitama gets a "C" grade. Meanwhile, Genos became the disciple of Saitama and learned about the power of saitama's punch on a training session.
s01e06 The Terrifying City 2015-11-10 16:05
The Terrifying City
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.
s01e07 The Ultimate Disciple 2015-11-17 16:05
The Ultimate Disciple
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.
s01e08 The Deep Sea King 2015-11-24 16:05
The Deep Sea King
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.
s01e09 Unyielding Justice 2015-12-01 16:05
Unyielding Justice
The Deep Sea King has defeated every hero who opposed him with ease. Genos is preparing to attack while Licenseless-Rider and Saitama rush to the evacuation shelter, where the battle continues.
s01e10 Unparalleled Peril 2015-12-08 16:05
Unparalleled Peril
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!
s01e11 The Dominator of the Universe 2015-12-15 16:05
The Dominator of the Universe
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.
s01e12 The Strongest Hero 2015-12-22 16:05
The Strongest Hero
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?