User blog comment:Paul.rea/Teen Wolf News 110712/@comment-5746767-20130109095154/@comment-4091815-20130109112636

They filmed episodes 1-3 as a block.

They spend eight days roughly on each episode but they don't always shoot in order.

They should have finished all three during the month of December.

Cora/Adelaide Kane has been on set since day 1 and wrapped for the holidays a couple days before the rest of the cast.

Meagan only did a one or two day shoot (the second day December 4th was her first) as far as I can tell.

Haley Webb has yet to appear on set.

We're pretty confident that Cora is the Mysterious girl in Episode one. That's based on some spoiler stuff we got from Adelaide and other factors.

http://teenwolf.wikia.com/wiki/User_blog:Paul.rea/Teen_Wolf_Season_3_Behind_the_Scenes