With Chuck and that loyal gaggle of Nerd Herders behind her, Yvonne Strahovski has (as previously reported) set her sights on a killer role in Dexter‘s upcoming seventh season.

Unfortunately, as is typical with the Showtime saga, details surrounding the guest spot are being kept under wraps. That didn’t, however, stop the bubbly actress from gushing to TVLine about her new gig on Wednesday night, at the Australian Breakthrough Awards (where she was an honoree).

“I feel very lucky to have come from Chuck, and then gone straight into a movie, I, Frankenstein, and then to something completely different again with Dexter,” Strahovski said of her transition from one cult fave to another.

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“Dexter is respected for the quality of work that the actors and the writers and everybody brings to that show,” she continued, praising the series she now calls home. “It’s just really nice to be part of something that’s so celebrated in this industry.”

As for how her mystery lady plays into Dexter‘s slice-n-dicey world, Strahovski was careful not to show her hand (or even one card) just yet. She did tease, cagily, that her character, Hannah McKay, is “a woman who is haunted by her past, and [becomes] involved in solving a murder through Dexter.”

And why exactly is she so beneficial in aiding such an investigation? Laughed Strahovski, “That is a mystery that I cannot reveal!” (With reporting by Vlada Gelman)