By Sandra Gonzalez
Updated November 15, 2011 at 12:00 PM EST
Trae Patton/NBC

Sure, Alexandra Daddario’s Kate may have gotten blown up by a bomb on White Collar (and yes, we’re still not over it) but on Parenthood, it’s her turn to cause some (emotional) explosions, specifically between Adam (Peter Krause) and Kristina (Monica Potter).

Last week, we were introduced to Rachel (Daddario), Adam and Crosby’s scantily-clad new secretary and office assistant, who unknowingly caused ripples between Adam and Kristina. (Kristina, who has been dealing with post-pregnancy stresses and insecurities, was not too happy to meet her husband’s hot, young employee.) But tonight, as Daddario teases, things may get a little more intentional. “There was obviously a preview at the end of the [last] episode that implied that there’s going to be more problems between Kristina and Adam and more tension as a result of my character’s actions,” she tells EW. “I just think I cause a bit of friction and distraction.”

But Daddario will be the first to defend her character — even to those who might cry fowl after seeing in the promo that Adam and Rachel end up locking lips. “I think her intentions are good,” she says. “I don’t think she has any ulterior motives….I don’t think the character is going into anything with the intention of [pursuing] one of the men she works for. I think anything else that happens is just a result of her being young and figuring things out.”

She explains, “I think being appreciated and being liked and respected for the work that she’s doing is something that makes her feel affectionate towards them.”

So how will things pan out between Kristina and Rachel next time they inevitably cross paths? “There’s a little bit more of them interacting,” she says. “I think the storyline brings up a lot of what’s right, what’s wrong, what’s the right thing to do in this type of situation kind of questions for both of them. I thought this last episode was so great because it seemed like they had reached such a great place in their relationship and I think it’s another challenge that comes as a result of my character being around.” (Erin Strecker contributed to this report.)

Parenthood airs tonight at 10 p.m. ET.

Read more:

‘Parenthood’ scoop: A new man in Kristina (and Amber’s?) life

‘Parenthood’ scoop: EP Jason Katims previews Adam and Kristina trouble, Sarah’s ex drama, and hope for Crosby and Jasmine