08/12/2012 02:35 pm ET Updated Oct 12, 2012

Yvonne Strahovski: 'Dexter' Gave Me Nightmares

"Dexter" Season 7's most buzzed about addition, "Chuck" alum Yvonne Strahovski, was very committed to learning the ins and outs of the Showtime series -- so much so, that it scared her.

Strahovski revealed at the Television Critics Association Press Tour this summer that she watched all six seasons of "Dexter" over the course of three weeks after finding out she got the role. And she got very caught up in the series.

"I had nightmares throughout those three weeks," Strahovski told IGN. "I was just in the thick of watching some episode that was pretty creepy. I was home alone and there was a knock at the door. It was some random real estate agent doing door knocks, and it was just so suspicious to me. I remember, at the door, I was like, 'Yes? What do you want?' He then asked me a thousand questions, and I was still completely, very suspicious. I thought for sure he was a serial killer. For sure."

Strahovski added that she already knew what was going to happen in some of her back-to-back viewing sessions. "Some of the seasons were spoiled for me because ... I knew Rita was going to die, I knew Debra was going to [see him]," she told IGN. "But what I really enjoyed were Debra's therapy sessions. I didn't know that was going to happen. I didn't know that she would discover that she had these complex feelings for Dexter. That was a total shock and surprise. So now I'm super excited when I get the scripts."

As for Hannah McKay, Strahovski's "Dexter" character who has a connection to the titular character, she couldn't reveal too much. At Comic-Con this summer, Strahovski said, Hannah is "woman of mystery with a dark past." She meets ‪Dexter and helps him with an investigation of an old murder mystery.

Find out what Strahovski spilled about "Dexter" Season 7 over at IGN.

Watch the first two minutes of "Dexter" Season 7 here and tune in for the full premiere on Sunday, September 30, at 9 p.m. ET on Showtime.

At least Strahovski made it through "Dexter." Below, take a look at stars who didn't watch their own shows.

TV Stars Who Don't Watch Their Own Shows