Curtis Armstrong's played the world's angriest man and one of its most popular nerds; now he's taken things to a whole other level as the disgruntled angel Metatron on The CW's Supernatural. BFTV checked back in with Curtis last week to ask him about playing the hit show's current Big Bad and the fantastic year that he's had.

Season 9 of Supernatural has been all about the aftermath of the angels falling from Heaven, so basically everything over the entire year can be blamed on Metatron. What was it like for Curtis to discover just how much he was responsible for? "It's certainly a great storyline and I was really surprised to see where everything was going," he said, because he didn't know it was coming. "I was hired to basically do one episode. They said it might recur, but they were very cautious about letting me know anything.

"I'd seen the show, but I wasn't a regular watcher, so the whole mythology, I was so far behind on what everybody was doing," he continued. "For me, after the first episode, when they said they were going to have me back, and as it started to evolve, and I began to realize just how horrible I was, [it] was really exciting.

"As an actor, these are not roles I get to play much," he told us. "And especially as well written as this one is. Being an evil character who is witty and articulate and sinister sort of all at the same time is a really rich feast to give an actor."

And while he couldn't offer any season-ending secrets, "Certainly the next two episodes are full of some very interesting events," he teased. "It's safe to say that people won't wind up loving me more than they do."

Stepping into the part of Metatron isn't the first time Curtis has played an angry character; after all, that was the whole premise behind Dan Vs. But that's about all the two roles have in common. "I think about Dan as sort of being like me a little. But I don't think of myself as being anything like Metatron," he commented. "He has issues which are unresolved, and unfortunately he's sort of taking out his issues on everybody.

"Whereas Dan was sort of limited in the damage he could do, Metatron is capable of sort of destroying the world if he chose to. You're dealing with an extraordinary power. And when that extraordinary power has that much bitterness or anger or something, no matter how well it's covered up, he's not a very nice man. It's a fascinating role."

Supernatural is known for its vocal fan base, so we asked Curtis what kind of reaction he's gotten from the audience after spending multiple episodes wreaking havoc on their show. "I think they're all very nice, because I've communicated with them a bit on Twitter, and I think they understand that I'm not responsible for what my character does," he told us. "They're enjoying it. They like my performance. They don't like the character. They seem to like me and hate the character with that passion that only Supernatural fans can muster."