"It’s a cool villain hitting at the right time to key into our main theme of the season," Robert Kirkman tells EW.

The following contains spoilers for "Invincible ... this season, we soon discovered that the real observer was none other ...

Angstrom Levy, a major antagonist from Invincible season 2 onward, could traverse dimensions. His plan to absorb knowledge from alternate selves failed when Invincible intervened, leaving him ...