Emily Deschanel, David Boreanaz Emily Deschanel, David Boreanaz

"Marriage is starting to look good on you."

That's what Seeley Booth (David Boreanaz) says to Temperance Brennan (Emily Deschanel) in the Season 8 finale of Fox's Bones when he notices Brennan looking longingly at a picture of Booth's newlywed mother. But has Brennan really changed her mind about marriage?

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Booth has always maintained that he will wait for Brennan to propose to him. But despite Booth's latest observation, Brennan suggests he shouldn't hold his breath. "Nobody can guarantee how they're going to feel about someone 10 years from now," she says. "Recent research suggests that cycles of attraction might run as few as four years. ... I love you Booth. Isn't that enough?"

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Doth the lady protest too much? Booth seems to think so. Watch an exclusive sneak peek at the finale below to see why Booth believes Brennan has "an unconscious desire" to get hitched. Do you think, after another scary run-in with serial killer Christopher Pelant (guest star Andrew Leeds

), Brennan will  pop the question?Bones' Season 8 finale airs Monday at 8/7c on Fox.