As of early 2026, the Season 3 English dub has been completed and released.
Since One-Punch Man has multiple seasons, Episode 12 serves as the season finale for Seasons 1, 2, and 3. All three seasons are currently available in English dub. Season 1, Episode 12: "The Strongest Hero" This is the epic conclusion to the Alien Conquerors arc. One Punch Man (Dub) Episode 12
This episode wraps up the Monster Association introduction and the Human Monster Saga's first half. As of early 2026, the Season 3 English
Saitama faces off against Lord Boros, the leader of the Dark Matter Thieves, in a battle that spans the moon and Earth's atmosphere. Meanwhile, the S-Class heroes finish their fight against Melzargald on the ground. Season 1, Episode 12: "The Strongest Hero" This
The finale concludes the first part of the massive Monster Association arc. It features a closing gag scene involving King navigating the monster hideout and intimidating a shape-shifting monster into submission.