‘Invincible’ Season 4 Is Bringing in Matthew Rhys for a Major Role

Congo lining up off of Prime Video’s announcement that Invincible will have its fifth season queued up while its fourth season is waiting in the wings, Skybound Entertainment announced new casting for the adult animated series that’ll play a major role in its upcoming season at San Diego Comic-Con.

During Invincible co-creator Robert Kirkman’s panel at San Diego Comic-Con, it was announced that actor Matthew Rhys (The Americans) will play the role of Dinosaurus. To all the folks who didn’t have the privilege of being in attendance at SDCC to witness the announcement firsthand, the official Invincible X/Twitter account had folks covered with a post showcasing what the character looks like… like a red dinosaur.

Admincible can now confirm Matthew Rhys is voicing Dinosaurus!!! And here’s a first look at the character design.

Source: trust me bro.

Actual source: @RobertKirkman’s SDCC panel happening now. pic.twitter.com/3zNx1MaFM5

— INVINCIBLE (@InvincibleHQ) July 24, 2025

While that sounds like the kind of throwaway villain-of-the-week kind of fodder for Mark Grayson and crew to make short work of in the opening moments of an episode, Dinosaurus plays a pretty crucial role in the comics and thus, in the animated show, as the next major hurdle for Mark to overcome in his coming-of-age superhero journey.

As mentioned earlier, Dinosaurus isn’t just a mindless brute; he’s a highly intelligent dinosaur person who quickly befriends Mark. Debuting in issue 68 of the comics, Dinosaurus is as close an analogue to Spider-Man‘s Lizard character as Invincible characters come. Dinosaurus is a split personality of a human scientist named David Anders. Contrary to rogues like Dr. Seismic, who justify their villainy as the end justifies the means, Anders’ primary goal, at least initially, is to use his intelligence to support environmental conservation efforts, which helps him and Grayson become fast friends as he navigates his new role as a hero.

What makes Dinosaurus’ introduction into Invincible so novel is that it occurs after his previous partnership with Cecil had been irreparably damaged due to their differing ideals about how far one should go in defending humanity. Dinosaurus becomes Mark’s closest ally as the looming Vilrumite war grows ever closer. But, as all things Invincible tend to go, Dinosaurus quickly becomes his newest antagonist, putting Mark in yet another moral quandary for the type of hero he wants to be.

We’ll spare you the meaty details for Dinosaurus’ heel turn. Still, as far as Invincible allies turned antagonists go, Dinosaurus is one of, if not the most interesting, characters in the series that forces Mark to confront the gray that exists to be a hero. Hopefully, Rhys’ acting chops will enrich the fan-favorite comic book character and ground Invincible‘s already inspired adaptation writing to new heights when he’s introduced properly to the Prime Video series.

Invincible Season 4 is in production.

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