Yvonne Strahovski: 'Dexter' Gave Me Nightmares

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

"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.

"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.

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

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