One-Punch Man - Season 1 - Eps 2: 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.
About One-Punch Man

Title: One-Punch Man
First Air Date: 2015-10-05
Last Air Date: 2019-07-03
Status: Returning Series
Rating: 8.4/10 (from 3665 votes)
Language: JA
Seasons: 4
Total Episodes: 24
Network: TV Tokyo TV Aichi TV Osaka
Genres: Animation, Comedy, Action & Adventure
Production Companies: Madhouse, J.C.STAFF, Bandai Visual, Asatsu-DK, jeki, Shueisha, Lantis, Banpresto, Good Smile Company, TV Tokyo
Synopsis
Saitama is a hero who only became a hero for fun. After three years of “special” training, though, he's become so strong that he's practically invincible. In fact, he's too strong — even his mightiest opponents are taken out with a single punch, and it turns out that being devastatingly powerful is actually kind of a bore. With his passion for being a hero lost along with his hair, yet still faced with new enemies every day, how much longer can he keep it going?
Cast

Makoto Furukawa
Saitama (voice)

Kaito Ishikawa
Genos (voice)

Hiroki Yasumoto
King (voice)

Kazuhiro Yamaji
Silverfang (voice)

Yuichi Nakamura
License-less Rider (voice)

Kenjiro Tsuda
Atomic Samurai (voice)

Aoi Yuki
Terrible Tornado (voice)

Saori Hayami
Hellish Blizzard (voice)

Hikaru Midorikawa
Garou (voice)