TV-MA
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, training hard for three years.
S1 • E2
A monster is moving toward City Z--one that has been created by the mysterious organization known as The House of Evolution.
S1 • E3
Saitama and Genos glean information about the House of Evolution and its founder, Dr. Genus.
S1 • E4
A group of Bald thugs use body armors to terrorize rich people. Sonic Speed, a hired ninja fights them. Unfortunately he meets with Saitama who is also a Bald.
S1 • E5
Determined to get a little recognition, Saitama decides to become a pro hero, but first, he must pass the Hero Association tests and become a full-fledged member.
S1 • E6
To remain on the "Hero" list Saitama has to show some activity in every week. Currently the City Z is defined as the 'ghost town'. Heroes are gathered together to find out whats going on.
S1 • E7
A giant meteor threatens to destroy City Z. All S-Rank heroes are called to City Z to destroy the meteor before its collision.
S1 • E8
Several Sea Folk appear and begin attacking citizens. They are easily defeated until The Deep Sea King appears and defeats many heroes including an S-Class.
S1 • E9
The fight with the Deep Sea King concludes and Saitama and Genos reflect on it as well as Saitama's promotion to B-Class.
S1 • E10
Saitama and all class S heroes are gathered together to be informed of an imminent extremely danger threat.
S1 • E11
An alien conqueror lands in a spaceship to conquer the Earth during the S class heroes meeting.
S1 • E12
Saitama takes on the alien leader in epic battle as the S class heroes fight the alien warriors and destroy the spaceship.
S1 • E13
Before Saitama became a hero, his local tailor tells him that he must close up shop due to pressure from a local gang and Saitama decides to help him out.
S1 • E14
Genos trying to find out the secret to Saitama's power by stalking him.
S1 • E15
A story about Genos when he meets Don Pacino, a C class wanted criminal and his gang in a warehouse along with man who is being held captive by the gang.
S1 • E16
Sonic faces his fear and meets a new friend.
S1 • E17
Silverfang stalks and pursues Saitama and Genos to come to his dojo where he tries to compete with Saitama in old martial arts ways.
S1 • E18
Story goes around frustrated Fubuki because of her elder sister Tatsumaki. Showing domination of elder sister over little one.
S1 • E19
Child Emperor investigates the murder of Zombieman.
Saitama
Genos
Saitama
Genos
Commentator
Bearded Worker
Garou
Mumen Rider
Bespectacled Worker
Bespectacled Worker