Invincible Season 4 Episode 4 (S4 E4) Preview: Release Date, Time and Where to Watch “Hurm”

Invincible Season 4 Episode 4 (S4 E4), titled “Hurm,” releases on Prime Video on Tuesday, March 25, 2026, at 12 AM PT / 3 AM ET. Written by Robert Kirkman himself, the episode takes Mark Grayson to Hell — a storyline with no equivalent in the original 144-issue comic series. Here is everything confirmed about the release schedule, the new characters arriving in Episode 4, and why this is the one week comic readers cannot spoil anything.

When Does Invincible Season 4 Episode 4 (S4 E4) Release on Prime Video?

Invincible Season 4 Episode 4 releases on Prime Video on Tuesday, March 25, 2026, at 12 AM PT / 3 AM ET. New episodes of Season 4 drop weekly on Tuesdays. The season consists of 8 episodes in total, with the finale scheduled for April 22, 2026. Prime Video has not released the titles for all remaining episodes; only “Hurm” for Episode 4 has been publicly confirmed at this stage.

What Happens in Invincible S4 E4 “Hurm”?

Mark Grayson is dragged to Hell at the end of Episode 3, and “Hurm” picks up directly from that moment. He is not navigating it alone. Damien Darkblood — the demon detective voiced by Clancy Brown — returns in Episode 4 after being banished to Hell at the end of Season 1 as punishment for pursuing the truth about Nolan Grayson too aggressively. His return has been anticipated since that banishment, and the pairing of Mark and Darkblood working together through Hell is the episode’s central dynamic.

The primary threat in “Hurm” is Volcanikka, voiced by Indira Varma. Volcanikka does not appear in the Invincible comic series — she is a show-original creation, which means there is no source material to consult about her nature, her motives, or how the confrontation resolves. Bruce Campbell is also part of Season 4’s cast as the voice of The Great Beast, another addition that exists outside the comics. Kirkman has constructed a version of Hell that the source material never visited across its entire run, and he wrote this specific episode himself rather than handing it to the show’s writing staff.

Why Is Invincible Season 4 Episode 4 Completely Unspoilable From the Comics?

The hell storyline in “Hurm” has no comic counterpart. Kirkman has spoken about the origin of this storyline — he originally conceived a hell sequence for Astounding Wolf-Man, a companion series he wrote beginning in 2007, but stepped back from using it there. The idea stayed unused across the entire run of the Invincible comic series, which ended in 2018 after 144 issues without ever sending Mark to Hell. The television series is where that story is finally being told, and Kirkman wrote the episode personally.

In a GamesRadar interview ahead of Episode 4, Kirkman confirmed that “Hurm” contains several longrunning subplots that he has been seeding throughout Season 4 — threads that will continue to develop well beyond this episode. None of those subplots have comic equivalents. The reader who has finished every single issue of the Invincible comic series sits in exactly the same position as someone who has never opened one when “Hurm” begins. That is an unusual situation for a show that has operated in close conversation with its source material since Season 1, and it is a meaningful part of why Episode 4 has generated considerable anticipation.

What Has Season 4 Covered Before Invincible S4 E4?

Season 4 opened following the events of Season 3 and has built steadily toward the moment that ends Episode 3. The season re-established Mark’s position on Earth and escalated the pressures on him across the first three episodes, with each instalment adding weight to the situation that culminates in his arrival in Hell. Season 4 currently holds a 100% score on Rotten Tomatoes across its opening episodes — a continuation of the critical standing the show has maintained since its Prime Video debut. Season 5 has already been renewed by Prime Video, which means whatever Kirkman plants in “Hurm” has a confirmed runway to pay off beyond this season.

Where Can You Watch Invincible Season 4 Episode 4?

Invincible Season 4 Episode 4 is available exclusively on Prime Video. An active Prime Video subscription is required. The show is not available on any other platform. New episodes release every Tuesday at 12 AM PT. Previous seasons are also available on Prime Video for viewers who want to catch up before “Hurm.” Season 5 is confirmed, meaning the threads Kirkman is laying in this episode have a full additional season to develop further.