Frustration. Anger. Betrayal.

Fans of The Killing experienced all these feelings and more after watching last night's season finale. For what reasons?

(SPOILER ALERT: Stop reading now if you have not yet watched "Orpheus Descending." The following interview with showrunner Veena Sud reveals major plot points.)

The murderer was not unveiled. Holder turned out to have a hidden, evil agenda. For a show whose tagline at the start of the season asked "Who Killed Rosie Larson," viewers were left reeling by what many feel was a manipulative, unsatisfactory conclusion.

What does Sud have to say about this?

"We never said you'll get closure at the end of season one," the producer told Alan Sepinwall of Hit Fix. "We said from the very beginning this is the anti-cop cop show. It's a show where nothing is what it seems, so throw out expectations... This season is 13 days in a high-profile murder investigation. And for the most part, most high-profile investigations don't get solved in 13 days."

Will we actually learn who killed Rosie on season two? Yes, Sud says.

"I can tell you there will be a resolution to this investigation in season two and there will also be the emergence of another case in season 2, but I can't tell you specifically where either of those happen."

As for the shocking reveal concerning Holder, Sud says it was always planned and that her team aimed to "create a sense and a perception of he's one thing, then the revelation, 'Oh no, he's not,' and then another twist on that idea."

Did they pull it off well? Were you left intrigued or just irritated? Respond now: What did you think of The Killing finale?

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.