A Bones Baby on the Way?!?

Talk about an exciting season finale on Bones!

According to E! Online, producers are planning to bring Zack back for the final episode of season four, though a deal is not finalized yet with actor Eric Millegan yet. 

Moreover, it's been confirmed that the wildly buzzed-about sex scene between Brennan and Booth will, indeed, take place. From there, season five will be all about the consequences of this hook-up, which begs the question:

Might Brennan be pregnant?!?

Chime in with your thoughts on that possiiblity now!