Feel the heat. Feel the tension.

The first promo for the sixth season premiere of Bones (September 23) has been released, and it looks pretty much exactly as billed. Titled "The Mastodon in the Room," it's pretty clear what that refers to, at least in part: Booth's new girlfriend, who he met in Afghanistan.

If you assumed when Booth got back, he and Brennan would be a real couple ... you're not the only one. But you're likely to be disappointed, at least in the short-term ...

[video url="http://www.tvfanatic.com/videos/bones-season-6-premiere-promo/" title="Bones Season 6 Premiere Promo"] [/video]

Thoughts on this Bones promo? Is she more jealous than she's letting on? Will Booth and his new girl last? Can you cut the tension with a knife or what?

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.