Invincible is an upcoming American superhero drama web television series based on the comic book series of the same name by Robert Kirkman and Cory Walker. The series is set to premiere on Amazon Prime Video on March 26, 2021. It will consist of eight episodes.I'm curious as to how long the episodes of Invincible will be. I'm hoping they'll be around 45 minutes to an hour, but I'm not sure. I guess we'll find out soon enough!