User blog comment:Chrisflistal/Franklin Hall becoming Graviton???/@comment-112155-20140208190606

So far, Ian Hart is the only actor announced as a recurring character that has only appeared in one episode.

With the recent announcement of some villains returning to the show, I think that very few characters fit that bill: Franklin Hall and Donnie Gill as comic-based characters (what fans are really asking for this show), Vanchat and Raina as original characters.

We also have Akela Amador, as she is one of the original characters that is really well liked by fans, but I think she won't be returning as a villain.