The fourth season of the American adult animated superhero series Invincible, based on the comic book series of the same name, was created for television by comic book writer Robert Kirkman who also wrote the comics. The season was produced by Amazon MGM Studios in association with Point Grey Pictures, Skybound North, Skybound Animation and Wind Sun Sky Entertainment. The series focuses on the aftermath of the Invincible War and Mark Grayson's fight with Conquest as depicted in the previous season. Meanwhile, Mark's father Nolan returns to Earth, as they along with Mark's brother Oliver join the Coalition of Planets in the Viltrumite War.
The season's overall plot shifts towards Nolan's past by providing deeper insights into Viltrumite society and highlighting Nolan's role in the Viltrum Empire's thirst for conquest. Furthermore, it presents a new perspective on the Empire that was absent from the original comics. The season introduces new cast members Danai Gurira and Lee Pace, the latter of whom debuts as the voice of Grand Regent Thragg, leader of the Empire and the series' main antagonist.
The season consists of eight episodes. The first three episodes were released simultaneously on Amazon Prime Video on March 18, 2026, with the remaining episodes scheduled for weekly release until April 22, 2026. The show received largely positive reviews, preserving its 100% rating on the review aggregator website Rotten Tomatoes.
Episodes
Cast and characters
Main Steven Yeun as Mark Grayson / Invincible Sandra Oh as Deborah "Debbie" Grayson J. K. Simmons as Nolan Grayson / Omni-Man Talon Warburton as young Nolan
Recurring
Guest
Production
Development The season was produced by Amazon MGM Studios in association with Point Grey Pictures, Skybound North, Skybound Animation and Wind Sun Sky Entertainment. The executive producers were creator and showrunner Robert Kirkman, David Alpert, Simon Racioppa, Margaret M. Dean, Catherine Winder, Seth Rogen and Evan Goldberg. The co-executive producers are Helen Leigh and Cory Walker, all part of the production team since the series' inception. Supervising directors on the season include Dan Duncan, Shaun O'Neil, and Jeff Allen.
In July 2024, preceding the third-season premiere, Amazon renewed Invincible for a fourth season. Prior to the release of the fourth season, Amazon Prime Video, Kirkman and showrunner Simon Racioppa had already committed to the series’ long-term development, having previously renewed the show for multiple seasons.
In the lead-up to the fourth season, Kirkman and the creative team indicated that the series would begin adapting later arcs of the source material, marking a shift toward more narratives involving the Invincible-verse and the Viltrumite Empire. This direction was discussed in multiple interviews, where Kirkman noted that subsequent seasons would escalate the scale of the conflict and introduce major antagonists central to the comic’s overarching storyline.
Writing The writing for the season was shaped by the aftermath of the "Invincible War" storyline, with the premiere episode depicting a world in recovery while advancing character development for Mark Grayson and his supporting cast.
Casting
The fourth season of Invincible continued the series’ approach of combining a stable core cast with the introduction of new characters drawn from later arcs of the comic. The season premiere, "Making the World a Better Place," retained the majority of the series’ established voice cast. Steven Yeun, Sandra Oh, and J. K. Simmons reprised their roles as Mark Grayson / Invincible, Debbie Grayson, and Nolan Grayson / Omni-Man, respectively, maintaining the central family dynamic of the series. Other returning actors include Gillian Jacobs as Atom Eve, Walton Goggins as Cecil Stedman, Cliff Curtis as Paul, and Ben Schwartz, who voiced both Rus and Shapesmith, alongside other actors whose characters were part of the ongoing story. Jonathan Banks reprised his role as Brit, appearing in the premiere; Christian Convery also returned as Oliver Grayson, showcasing the character’s progression into adolescence within the narrative. As the series progressed, new characters were introduced. In October 2025, Entertainment Weekly announced Lee Pace would voice Grand Regent Thragg, considered one of the main antagonists and, according to Kirkman, the most powerful Viltrumite.
The decision to cast Pace as the character of Thragg was based on the production’s desire to introduce a commanding character in the role of the Viltrumite leader as the series began to follow the later narrative arcs in the storyline. The character’s introduction was a move towards a more expansive battle, and the casting decision was based on this as a reflection and required an actor capable of conveying authority and scale, with Pace selected for his ability to embody the character’s dominance and restraint, as discussed in interviews by series creator Robert Kirkman.
Additional casting included Matthew Rhys, whose involvement was announced by Deadline prior to the season’s release, with details of his role initially withheld. Later reports identified him as voicing Dinosaurus, who first appears in the comics in issue #68 where he battles Mark, who has robot arms after his battle with Conquest. Danai Gurira was also reported to have joined the cast as Universa.
Music John Paesano, who had composed the score across the first three seasons, returned to score the fourth season, with music supervision handled by Gabe Hilfer and Henry van Roden, both also continuing in roles they had held since the second season. The season combines Paesano's original compositions with a selection of licensed tracks drawn from rock, electronic, and hip-hop.
The season opens with "If I Get High" by English rock band Nothing But Thieves, a track from their 2015 self-titled debut album. The song accompanies a montage sequence setting the emotional tone for the season's opening episode. Among the season's more discussed musical moments, "Raining Blood" by California thrash metal band Slayer soundtracks the climactic sequence of the fourth episode, in which Mark Grayson teams up with Satan, voiced by Bruce Campbell, to battle the villainous Volcanikka in Hell. According to Robert Kirkman, the episode had to contain something unusual and new since he made up the plot especially for the series without referring to comics.
Earlier notable placements include "Tom Tom" by Canadian electronic band Holy Fuck, which became associated with the Flaxans, and Radiohead's "Karma Police", featured in the second season premiere.
Release The fourth season of Invincible premiered on March 18, 2026. The first three episodes of the season became available simultaneously on the online streaming service Amazon Prime Video. with subsequent episodes released weekly through April 22, 2026, when the season finale aired.
Reception
Audience reception and viewership
The fourth episode, "Hurm," was received poorly by fans, becoming the lowest rated episode of the show on IMDb, falling below the previous low set during the second season with its second episode. Many viewers pointed to the episode's departure from the source material, which followed an original storyline set in Hell as the main reason for their disappointment. The rest of the season was received highly. The fifth episode, "Give Us a Moment", became the second-highest rated episode in the series' history on IMDb, behind only the third season finale.
Following the conclusion of the season, Invincible claimed the number one spot on Prime Video's top ten titles in the United States, surpassing the fifth and final season of The Boys.
Critical response
On Metacritic, which uses a weighted average, the season holds a score of 77 out of 100 based on 6 reviews, indicating "generally favorable reviews".
The season's animation drew mixed commentary from critics. In a review for Gizmodo, Isaiah Colbert noted that the series's near-annual release pace had begun to affect its animation quality, with certain action sequences exhibiting visible shortcuts, including slow-motion techniques and static frames used to simulate motion. He also remarked that there remained a possibility the season could recover with a stronger finale, as had been the case with the third season. In a similar review Pauli Poisuo of Looper noted that inconsistent animation quality across the season was a recurring concern among viewers, though it was not considered a significant obstacle to the season's overall reception.
Ben Travers of Decider gave the season a positive review, noted the season's emphasis on the fallout from past events and Mark Grayson's efforts to regain trust in the face of fresh dangers, describing it as preserving the show's blend of character-driven storytelling and action. Writing for Screen Rant, Craig Elvy described the season as one of the series’ most emotionally driven installments, emphasizing its focus on character development and thematic weight. Similarly, Siddhant Adlakha of IGN said that, despite some pacing issues and narrative detours, the season represents one of the show’s most expansive entries, with an increased scale and broader storytelling focus. Kaiya Shunyata of RogerEbert.com reviewed the season, stating that is the series's strongest entry to date: stating that "Invincible confronts its audience with a question that has long troubled generations: is violence inherent, or is it passed down?." As for the themes, Shunyata stated that the "Violence and intergenerational violence had been treated with more depth than in previous seasons." Shunyata also commented on Steven Yeun's arc, as well as the voicing of actor J.K. Simmons as Nolan," And ended up praising how season managed to change course and concentrate more on developing the characters rather than action.
Other reviews presented more mixed observations. A review from TheDemonster described the premiere as largely focused on setup, with early episodes emphasizing character conflict and preparation for future story arcs rather than immediate resolution.
In a similar review, from Nexus Point News and Nerd Initiative described the season as the start of a new phase for the series. They highlighted its focus on transition, increased world-building, and the introduction of new conflicts. Additionally, they pointed out that the early episodes mainly serve as preparation for later developments. Christopher Mills of Nexus Point News rated the series 4 out of 5 stars.
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