Invincible Season 4 started with its first three episodes on March 18 on Prime Video, with the rest rolling out weekly through April 22, but a chunk of the fanbase has turned on the season fast.
The biggest flashpoint is Episode 4, “Hurm,” and the backlash has been strong enough that Season 4 now has the lowest Rotten Tomatoes audience score of the four seasons at 87%. For comparison, Season 1 sits at 94%, Season 2 at 90%, and Season 3 at 93%.
Episode 4 is where the backlash exploded
A lot of the blowback centers on “Hurm,” which aired March 25.
The episode drew attention because it introduced a Hell-based storyline that was not pulled from the comics, with Damien Darkblood brought back for material Robert Kirkman had talked about wanting to do but never used in the original run. That change did not go over well with a lot of viewers, who felt the episode stalled the season right when fans were expecting the Viltrumite plot to hit harder.
The frustration showed up in the ratings. Episode 4 became the lowest-rated episode of the entire series on IMDb, as the score had dropped to 6.7 before Episode 5 aired.
Redditors and YouTubers also called it the worst episode of the series, with complaints that the Damien Darkblood subplot dragged, the jokes fell flat, and the episode derailed the momentum built by the premiere.
Fans are ripping the animation too
The other big complaint is the animation. All over X, fans have noticed perceived cost-cutting, pointing to repeated animation, long stretches of static dialogue, and the Cerberus fight happening off-screen rather than being fully shown.
Even some of the positive critical notices have quietly admitted that problem is still there.
Rotten Tomatoes’ Season 4 page includes the first review summary noting that the show keeps pushing the superhero genre forward “even if the animation doesn’t always match the strength of its storytelling.”
The William recast made things worse
Episode 4 also set off backlash because William suddenly sounded different.
Andrew Rannells is no longer voicing the character, with Brandon Scott Jones taking over in Season 4. Fans immediately noticed, and were already calling the new performance a step down.
It follows the Tech Jacket backlash
This isn’t the first Season 4 issue to get hit.
Ahead of the premiere, fans were already complaining after Tech Jacket was changed from Zack Thompson in the comics to a female version named Zoe voiced by Zoey Deutch.
The gender-swap sparked backlash because Tech Jacket is not some random background character in the comics, and fans were already worried the show was messing with the Allen dynamic and changing established material for no good reason.
The problem is starting to look bigger than one episode
Put it together and the backlash is pretty clear. Fans are complaining about filler, original material that feels off-brand, weak animation, a noticeable recast, and more comic changes they never asked for.
Season 4 still has episodes left, but the reaction around “Hurm” and the drop to the series’ lowest Rotten Tomatoes audience score so far show that a vocal part of the audience thinks Invincible is slipping this year.
