Pretty Little Liars celebrated Halloween last night via a fun, flashback-laden episode that gave us new insight into Alison and maybe dropped a few clues about A's identity.

But fans of this ABC Family hit should now shift their focus to a new holiday: New Year's Eve. That's because fresh episodes - that delve directly into ongoing events from the timeline which left us hanging this summer - kick off in January 2012.

Look for a time jump of about one month to take place when we return to Rosewod... and for someone to get killed.... someone to disappear... and someone to get exposed. All that and more is teased in the following trailer. Watch, enjoy and let the guessing games begin!

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