The released promo videos for "Teen Wolf" Season 3B, Episode 20 titled "Echo House" tease about Stiles' (Dylan O'Brien) friends still coming up with a plan to save him but he wants to protect them so he checks himself in the Eichen House mental hospital. How will Scott (Tyler Posey), Allison (Crystal Reed) and the others stop the Nogitsune possessing Stiles without hurting him?

"Make sure I never get out," Stiles tells his best friend Scott. Though Scott thinks the plan to save Stiles is bad, Allison insists that they do not have other options at this point.

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Credit: Hypable

The other promo videos show the Nogitsune appearing again treating the fans with another look at the Dark Stiles, Derek (Tyler Hoechlin) and Chris Argent (J.R. Bourne) having a conversation in prison and Stiles still getting in trouble while inside the mental institution. Click HERE to see the "Teen Wolf" Season 3B, Episode 20 "Echo House" promo videos.

"Would you feel any remorse putting Stiles down?" Derek asked Chris. The former werewolf-hunter's response to the question: "Stiles, yes. But not a nogitsune." In the E!Online Spoiler Chat report, series creator Jeff Davis gave the fans an idea on what could happen in the finale episode titled "The Divine Move."

"People in the know will understand that it refers to a move in the game of Go, which is the Japanese version of Chess, basically. It's a Go game. Go is a very Asian game. It's Chinese, Korean and Japanese. It's a very difficult game to learn and compete in," Mr Davis explained in the entertainment Web site. The report further noted that fans should start preparing to watch "one epic mindgame" in the final episode of "Teen Wolf" Season 3.

Additionally, the Hypable report speculates the final episode "The Divine Move" will cost the life of a major character since the "Teen Wolf" cast and crew has been teasing about it when Season 3B kicked off but never revealing who it will be.

"Teen Wolf" Season 3B, Episode 20 "Echo House" is scheduled to air on Monday night, Feb. 24, at 10 pm ET on MTV.

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