In Invincible Season 3, Episode 3, Mark ditches his traditional yellow-black suit, which viewers got used to in the previous two seasons.
Invincible creator Robert Kirkman says Bryan Cranston keeps turning down a role in the animated superhero show.
While Invincible focuses on the superheroes of the show, it's the non-powered characters who really make the series great.
It's not just his introduction that's been teased either, as fans think they've worked out who's playing him as well.
The Invincible animated series finally revealed the origin of character Cecil Stedman, but it cut a fascinating superhero's ...