'Teen Wolf' Season 3 ONLINE LIVE STREAMING / Spoilers: Doug Jones Joins Season 3 Cast / Episode 12: "Lunar Ellipse" Mid Season Finale Tonight at 10 PM ET on MTV [PREVIEW] 

Teen Wolf airs its midseason finale Monday night, August 19 at 10/9c on MTV.

Check out this online live streaming option if you can't make it to a TV: http://www.mtv.com/shows/teen_wolf/video.jhtml?filter=fulleps

There will be some new faces in Beacon Hills come January. The mid-season finale wraps up the first half of Season 3 tonight.  To tie you over until the second half premiere January 6, we've got some spoilers and cast news to dish.

We already heard about Pretty Little Liars star Arden Cho joining the Teen Wolf Season 3 cast with a reoccurring role. Now we have reports that sci-fi veteran Doug Jones would also be joining the cast. Jones [Hellboy, Falling Skies] has been confirmed to play the part of a "known killer" named Barrow. Jones, as Barrow, will make his first appearance in the 15^th episode titled "Galvanize".

No other details surrounding Jones's role on the show have been confirmed. So no word on how long he'll make it through the season or who he's planning on killing.

Though, the fact that Barrow is a "known killer" makes me think he may somehow be related to Scott's FBI agent dad.

Tune in for the Teen Wolf midseason 3 finale tonight at 10 PM ET on MTV.

Online live streaming option: http://www.mtv.com/shows/teen_wolf/video.jhtml?filter=fulleps