Executive producer Evan Katz recently said The Event would conclude its fall season with a major cliffhanger. What does this mean?

Fans will find out on November 29.

This Monday, NBC airs "Everything Will Change," a fitting title for the final episode of 2010. During this hour, President Martinez will try to root out a traitor, Thomas will reveal a new plan and Leila and Sean will try to avoid mercenaries. Get an early look at the fall finale in this preview:

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.