Dexter Season 8 spoilers build suspense into the final season of Showtime's hit psychopath series. Hannah McKay, Masuka, and a new character called the "psychopath whisperer" will add to the complications in Dexter Morgan's life. Here's what we know.

Yvonne Strahovski's Hannah McKay left Dexter Season 7 with a mysterious black orchid, which she left at Dexter's door. The fugitive will be returning in Season 8 with more revelations.

"Basically, I'm allowed to tease nothing," Yvonne told TV Line when asked what her character will bring to Dexter Season 8. "But the question is, how and in what fashion does Hannah come back? And what method does she use to reintroduce herself into Dexter's crazy life? And what motivates her? Is it going to be love or revenge?" Yvonne's questions echo back the same questions on Dexter's viewers.

C.S. Lee's Masuka, who has been "safe" and "harmless" in the past seven years of Dexter, will come in an interestingly more exposed package this year. Viewers remember him talking about Hannah McKay without judgment about her past. Where would he stand if he discovers what his colleague Dexter does on the side?

C.S. Lee has some scoop about the third major character presence in Dexter's final season. Viewers will meet someone the FBI calls, the "Psychopath Whisperer."

In a new promo clip released by Showtime, Dr Evelyn Vogel is seen leaving Dexter with some pieces of his personal history. This will recreate a puzzle for Dexter, and things will never be the same for the serial killer.

"Psychopaths are not a mistake of nature, they're a gift," says Dr Evelyn Vogel, portrayed by French actress Charlotte Rampling.

"She's needed to reveal a lot of things about Dexter to Dexter himself," Charlotte says. From her one-liner about psychopaths being a "gift," viewers can tell she will not be just a minor presence in Dexter's farewell season. Spoilers indicate Dr Vogel worked with Debra's dad Harry in formulating Dexter's Code.

'Start' the slideshow for some Dexter Season 8 images.

VIDEO: Dexter Season 8 with 'The Psychopath Whisperer'

VIDEO: Dexter Season 8 Spoilers, Episode 1 Scene | Final Season for the Psychopath

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