Episodes
Episode: 1x01 | Airdate: Oct 6, 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.
Episode: 1x02 | Airdate: Oct 13, 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.
Episode: 1x03 | Airdate: Oct 20, 2015
Saitama and Genos track down an evil scientist who wants to know the secret to Saitama's power.
Episode: 1x04 | Airdate: Oct 27, 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.
Episode: 1x05 | Airdate: Nov 3, 2015
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.
Episode: 1x06 | Airdate: Nov 10, 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.
Episode: 1x07 | Airdate: Nov 17, 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.
Episode: 1x08 | Airdate: Nov 24, 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.
Episode: 1x09 | Airdate: Dec 1, 2015
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.
Episode: 1x10 | Airdate: Dec 8, 2015
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!
Episode: 1x11 | Airdate: Dec 15, 2015
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.
Episode: 1x12 | Airdate: Dec 22, 2015
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?
Specials
Episode: S01 Special | Airdate: May 27, 2016 (11 min)
Episode: S01 Special | Airdate: Apr 22, 2016 (11 min)
Episode: S01 Special | Airdate: Mar 25, 2016 (11 min)
Episode: S01 Special | Airdate: Feb 24, 2016 (11 min)
Sonic trains in the woods, trying to deal with his defeat. Whilst trying to become stronger he makes unexpected friend.
Episode: S01 Special | Airdate: Jan 29, 2016
Episode: S01 Special | Airdate: Dec 24, 2015
Episode: S01 Special | Airdate: Dec 4, 2015