Kevin Bacon Kevin Bacon

As The Following draws to a close with a two-hour series finale Monday, Ryan Hardy (Kevin Bacon) isn't quite out of the woods yet.

His final showdown with Theo (Michael Ealy) will reveal a shocking betrayal. We know that the late Joe Carroll (James Purefoy), Lily Gray (Connie Nielsen) and Theo are bad guys, but were they working alone? Of course not!

Fall Preview: Get a sneak peek at all the new shows

"In the finale, a character's true nature will be revealed," executive producer Brett Mahoney told recently. There will, of course, be fatalities. Sounds like The Following is going to go out with one of its favorite narrative devices: the mole. Who do you think it is? And will he or she take out Ryan?

Tell us your theories in the comments - and watch an exclusive sneak peek from the finale below.