Brennan, however, has other things in mind other than tonight's case. She's stumbled on an opportunity to explore what might be a crucial link in the evolutionary chain, forcing her to choose between her work at the Jeffersonian and the opportunity of a lifetime.



Meanwhile, Brennan isn't the only one confronted with the opportunity to leave. The Secretary of Defense wants Booth back in the army as a Sergeant Major training. But it looks like he's having second thoughts about leaving his work at the FBI, not to mention Brennan.



Will Brennan and Booth leave? Find out tonight in the season finale of Bones.

(Image courtesy of FOX)