The long-term prospects for Dollhouse aren't good.

The series is struggling big time with its ratings and, while Fox has promised to air all 13 episode of season two, it won't commit beyond that. Viewers should prepare to say goodbye.

But in the meantime, Dichen Lachman (Sierra) says there is a lot to be excited about.

Speaking to TV Addict, the actress has previewed the October 23 episode, in which the Rossum Corporation will give fans a closer look at one of the Dollhouse’s most mysterious members.

“[But] not too close,” says the actress. “Just enough to understand what happened in Sierra’s life to bring her to where she is today.... This season is less about the engagement-of-the-week and more about how deep this thing [the Dollhouse] goes and how very wrong it is. Be excited, it’s really really cool.”

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