'Teen Wolf' Season 3B Spoilers: Can Scott Save His Best Friend Stiles from The Nogitsune Possesion? Watch Promo Videos for Upcoming Episode 19 'Letharia Vulpina'

What happened to Stiles (Dylan O'Brien) in "Teen Wolf" Season 3B Episode 18 titled "Riddled" will make his friends more worried. Promo videos for the next episode has been released teasing about Stiles' dark side due to the Nogitsune possession, can his best friend Scott (Tyler Posey) save him?

The first promo video released show the "Teen Wolf" gang dealing with Stiles' behaviour that made Allison (Crystal Reed) ask the question "Did Stiles really do this?" However, Scott believes there is something inside his best friend that causes trouble in Beacon Hills.

The synopsis for Episode 19 in the Hypable report reads: "Scott and the others try to prevent a disaster; Lydia and Allison seek out an unlikely teacher." Scott and his pack will be determined to save Stiles from the Nogitsune possessing him but Derek (Tyler Hoechlin) weighs first the cost of saving Stiles' life and described the situation to be an intense conflict.

"That's something we all have to deal with for the rest of the season is the idea of, 'What are we attacking and what are we saving?' Are we saving a friend or a monster? Do you kill someone you care about to save many, or do you try to save everyone and possibly fail miserably? That's going to be the conflict for a lot of people," revealed Tyler Hoechlin in an interview with Just Jared Jr.

In the second promo video, another Scott-Kira moment can be seen while they were running for the cross country practice in the woods. The exclusive E!Online TV Scoop report had actor Tyler Posey dishing about the slowly growing attraction between his character and newbie Kira portrayed by Arden Cho.

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"You get to see them become friends before a relationship, if that ever happens. Right now, they're definitely mostly friends who want to help each other out, and they also have feelings for each other, but I think they both know they have to put those feelings aside for a second while they deal with saving the world. Everything that they're going through gives them a bigger connection and it's just a really cool little relationship to watch and see blossom," teased Tyler Posey.

However, the Scott-Kira moment in the video clip was interrupted when Stiles discovered a chain beneath the leaves and Coach Finstock (Orny Adams) got shot with an arrow. "Teen Wolf" Season 3B Episode 19 titled "Letharia Vulpina" is scheduled to air on Monday night, February 17, at 10 pm ET on MTV.

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