Former Prison Break actor Robert Knepper has been upgraded to from “guest star” to series “regular” on Heroes! I’m so excited about this because I can tell he is going to bring some much needed evil into the show.

Here is the scoop:

Knepper’s character Samuel is at the center of the major new story line on the sci-fi series. He is the charismatic but evil Earth-moving ringleader of a traveling carnival who recruits people with special powers for a mysterious purpose.

Knepper originally signed for six episodes and so far has appeared in every episode of the show’s upcoming fourth season. Knepper, who recently joined the cast of “Heroes” for the series’ panel at Comic-Con in San Diego, follows in the footsteps of another baddie on the show, Zachary Quinto (Sylar), who also started off as a recurring before becoming one of the show’s breakout stars.

Maybe Knepper will be the one to “off” Danko!