Dollhouse viewers learned a valuable lesson in May: when you overload a doll with multiple personalities, serious problems arise.

Such a development took place on the drama's first season finale, as Eliza Dushku Echo received a bevy of personalities at once, the combination causing a shortage in her brain.

How will the character deal with that problem this season, which premiere tonight?

"Basically, through force of will," series creator Joss Whedon told TV Guide. "She did have all those personalities dumped into her at once and as we pick up, we're going to find out that that's starting to affect her."

How will they affect her? A few Dollhouse spoilers reveal clues.

But Dushku herself says:

"She's much more directed and driven, and even in her doll state is growing, and learning and starting to try to access these personalities to see what they can help her with, because she has a mission that she understands now, which is to get back to her personality and get everybody back to theirs."

The show airs at 9 p.m. on Fox.

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