When does Invincible return?

Invincible is an adult animated superhero television series. It is based on the Image Comics comic book series of the same name. Steven Yeun stars in the series as Mark Grayson / Invincible alongside Sandra Oh and J. K. Simmons. The series has received widespread critical acclaim for its animation, action sequences, story, voice performances, and emotional weight.
Mark Grayson is a seemingly normal teenager whose father Nolan is the most powerful superhero on the planet. Shortly after his seventeenth birthday, Mark begins to develop powers of his own and learns how to wield them with help from his father.