One Punch Man Episode 4

GREAT

100%

of 10 scoutsrecommend

Review Summary

Watch this action-packed episode for its pure comedy gold and the hilarious dynamic between Saitama and Genos, featuring Speed-o'-Sound Sonic.

Animation & Style

Character Writing & Lore

Pacing

World Building & Setting

👀 SPOILER-FREE SUMMARY

Episode 4 throws a wildly entertaining new rival into Saitama's orbit: Speed-o'-Sound Sonic, a ninja assassin who takes himself extremely seriously and has the speed to back it up. The comedy engine here runs on the collision between Sonic's lethal confidence and Saitama's aggressively unbothered energy. Madhouse delivers sharp, kinetic action sequences that showcase Sonic's abilities while mining every possible laugh from Saitama's blank-faced indifference to someone who should be a genuine threat. Beyond the fights and gags, the episode quietly builds on a growing theme — Saitama can obliterate any enemy, but he can't seem to earn a shred of public recognition for it. That tension between godlike power and complete anonymity gives the humor real weight. Brisk pacing keeps every scene punchy and purposeful.

🔥 KEY MOMENTS

⚠️ Spoiler Alert!

Paradisers' Botched Revolution

Hammerhead and his bald-headed crew declare war on the wealthy and demand a work-free utopia — then immediately demolish the wrong building. Their incompetence sets the comedic tone for the entire episode.

Sonic Shreds the Paradisers

Speed-o'-Sound Sonic makes his explosive debut, cutting through Hammerhead's entire crew in seconds with terrifying precision. It's a genuine showcase of elite combat skill — against anyone who isn't Saitama.

Saitama vs. Hammerhead

Saitama tracks down Hammerhead out of sheer annoyance at being mistaken for one of his bald goons. He casually critiques Hammerhead's lazy philosophy and shatters his power suit with a single punch.

Sonic's Painful Miscalculation

Sonic mistakes Saitama for a Paradiser and launches a full-speed attack, only for Saitama to accidentally counter him in the most humiliating way possible — a groin-first collision. The fight is over before it starts.

The Hero Association Decision

Saitama has a genuine moment of existential crisis when he realizes nobody knows who he is despite all his heroics. This pushes him to register with the Hero Association, setting the stage for the next arc of the series.

📍 ARC CONTEXT

Coming off the Dr. Genus confrontation in episode 3, which tested Saitama's power against engineered threats, episode 4 pivots to a more personal frustration: nobody knows who he is despite his impossible strength. The introduction of Sonic as a recurring foil adds a new comedic and combative thread to the season. This episode directly sets up episode 5, 'The Ultimate Master,' where Saitama and Genos take concrete steps toward official hero recognition by registering with the Hero Association.

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