Who's Missing From the 'Dexter' Season 8 Trailer?

Hint: She's the woman who might wreak more havoc in Dexter Morgan's world than his broken sister or a snoopy new psychiatrist.

Who's Missing From the 'Dexter' Season 8 Trailer?

In Showtime's new trailer for the upcoming eighth — and final — season of "Dexter," everybody's favorite serial killer (Michael C. Hall) is up to his kill apron in women looking to do him in, and the preview doesn't even include the woman who could end up being Dexter's ultimate doom.

That would be Mr. Morgan's ex, Hannah McKay (Yvonne Strahovski, "Chuck"), who, when last we saw her, had escaped from police custody in the hospital and then left an ominous black orchid at Dexter's door.

She's definitely back for the show's final season, and the storyline is such an intense, potentially spoiler-filled part of the final run that Strahovski tells Yahoo! TV she can't even tell us when she first appears in Season 8, or how many episodes she'll appear in.

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"Unfortunately, those are things I can't share, because the big question is for Hannah, because she got away … what has she been doing all this time?" Strahovski says.

"Is she going to pop back into Dexter's life, and if so, how's she going to do that exactly? What will be her intentions at the time? So that's really the exciting part of that."

Strahovski, who says it was a happy surprise when she was asked to return for the Emmy-winning drama's final season, also says she's so excited to see how the show, and her character's storyline, will wrap up that she avoided asking the writers about the ending.

"I kind of chose not to ask what was going to happen with [Hannah]. … I personally don't know what the character's fate will be. I think I'm almost too scared to ask," she said with a laugh. "Part of me doesn't want to spoil the surprise."

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Hannah is not the only woman Dexter has to be worried about, of course. As the new season trailer reveals, Dex's adopted sister Deb (Jennifer Carpenter), who murdered Maria LaGuerta in last season's finale to protect her brother after LaGuerta learned Dexter's secret, is a total mess.

Taking drugs (legal and otherwise), hitting the booze, and hooking up with bad guys can't make her forget what she did, and she's channeling her anger at Dexter.

"My life is none of your business," she tells him. "You made me compromise everything about myself that I care about. And I hate you for it. I shot the wrong person in that trailer."

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And then there's new Miami Metro neuropsychiatrist Evelyn Vogel (Charlotte Rampling), whose nickname, "The Psychopath Whisperer," explains why she's zeroing in on Dexter and peppering him with some deep and leading questions: He's the textbook definition of a psychopath, something the good doctor is going to note.

So, who will be the key to what might finally be the end of not only Dexter's serial killer ways, but also possibly his freedom, or even his life: the pesky Psychopath Whisperer? Hannah and the reasons behind her re-entry into Dexter's life in Season 8?

Or Deb, the woman he grew up with, the woman who was once in love with him and, now, the policewoman who murdered her boss for him?

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The Season 8 trailer shows Deb, after being arrested on a DUI charge and still in a very boozed-up state, walking into the police station where she and Dexter work and telling fellow cop (and former lover) Joey Quinn (Desmond Harrington), "I wanna make an official statement."

Uh-oh, Dex.

"Dexter" Season 8 premieres on Showtime June 30 at 9 PM, and Season 7 is now available on DVD and Blu-ray from Showtime Entertainment.