The WORST episodes of One-Punch Man
Every episode of One-Punch Man ever, ranked from worst to best by thousands of votes from fans of the show. The worst episodes of One-Punch Man!
Saitama is a superhero 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 that he wins all of his battles too easily.
#1 - Immortal Bloodbath
Season 3 - Episode 10 - Aired 12/14/2025
#2 - Motley Heroes
Season 3 - Episode 6 - Aired 11/16/2025
Class-S heroes plan the Monster Association assault, but Amai Mask arrives and clashes with them.
#3 - Counterstrike
Season 3 - Episode 7 - Aired 11/23/2025
Heroes arrive in Z City but face a monster ambush. A-class aids while Gyoro-Gyoro watches the fight.
#4 - Organism Limits
Season 3 - Episode 3 - Aired 10/26/2025
Garou fights Insect God and King the Ripper, while Tareo gets kidnapped. Dr. Kuseno visits Saitama.
#5 - Brave Child
Season 3 - Episode 9 - Aired 12/7/2025
Child Emperor finds Waganma and faces Phoenix Man, using his ultimate weapon to protect him.
#6 - Strategy Meeting
Season 3 - Episode 1 - Aired 10/12/2025
The heroes plan a rescue of a child kidnapped by monsters, while Garou awakens deep underground.
#7 - Monster Traits
Season 3 - Episode 2 - Aired 10/19/2025
On his way to hunt heroes, Garou dines and dashes at a restaurant, but is chased by Saitama.
#8 - Counterattack Signal
Season 3 - Episode 4 - Aired 11/2/2025
The heroes prepare for battle without Silverfang and Genos. Garou attacks the Monster Association.
#9 - Monster King
Season 3 - Episode 5 - Aired 11/9/2025
The S-class heroes race to rescue a child hostage as Garou awakens in the Monster Association’s lair.
#11 - Martial Arts Tournament
Season 2 - Episode 5 - Aired 5/8/2019
Monsters from the Monster Association launch simultaneous attacks on all the human cities, attempting to overwhelm the forces of the Hero Association. Meanwhile, the “Super Fight” martial arts tournament kicks off.
#12 - The Encircling Net of Justice
Season 2 - Episode 10 - Aired 6/19/2019
The Monster Association issues a challenge to the Hero Association, telling them they have only three days to rescue the hostage Waganma. Elsewhere, Garou tries to recover from his constant fighting, but things don’t quite go as planned.
#13 - Metal Bat
Season 2 - Episode 4 - Aired 5/1/2019
Assigned to guard a VIP and his son, Metal Bat couldn't be less thrilled. But when the group is suddenly attacked all hell breaks loose. Meanwhile, Saitama has disguised himself as Charanko in order to enter the “Super Fight” martial arts tournament.
#14 - The Uprising of the Monsters
Season 2 - Episode 6 - Aired 5/15/2019
The Super Fight tournament kicks off while Genos takes on multiple monsters who have appeared in City C. Elsewhere, countless monsters are wreaking havoc in multiple areas, but the Hero Association is being overwhelmed by the sheer number of threats.
#15 - The Ultimate Dilemma
Season 2 - Episode 9 - Aired 6/12/2019
Just as Suiryu finds himself in the depths of despair, Saitama suddenly appears to help him out. But despite all Saitama’s strength, there’s still something bugging the hero that he just can’t seem to shake.
#16 - Return of the Hero
Season 2 - Episode 1 - Aired 4/10/2019
Saitama is out shopping with Genos in tow when the pair come across G4, a demonic robot on a mission to eliminate King. Elsewhere, Sitch attempts to recruit various cutthroats, villains and assassins of the underworld to help the Hero Association.
#17 - The Terrifying City
Season 1 - Episode 6 - Aired 11/8/2015
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.
#18 - The Strongest Man
Season 1 - Episode 1 - Aired 10/4/2015
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.
#19 - The Strong Ones Fight Back
Season 2 - Episode 8 - Aired 5/29/2019
Goketsu, the first Super Fight Tournament champion, arrives in the stadium. Having now become a monster, he’s aiming to force the Super Fight competitors to turn into monsters themselves. When several do, it’s up to Suiryu to take them on alone.
#20 - The Deep Sea King
Season 1 - Episode 8 - Aired 11/22/2015
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.
#21 - The Modern Ninja
Season 1 - Episode 4 - Aired 10/26/2015
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.
#22 - Human Monster
Season 2 - Episode 2 - Aired 4/17/2019
Garou issues a declaration of war on the Hero Association through terrifying means, Hellish Blizzard gives Saitama an ultimatum, and Genos decides to eliminate his master’s stalker, Speed-o’-Sound Sonic.
#23 - The Ultimate Master
Season 1 - Episode 5 - Aired 11/1/2015
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.
#24 - The Ultimate Disciple
Season 1 - Episode 7 - Aired 11/15/2015
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.
#25 - The Lone Cyborg
Season 1 - Episode 2 - Aired 10/11/2015
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.