'Supernatural' Season 9 Spoilers: Fun is Just Getting Started for Dean Winchester, Watch Promo Videos for Episode 22 Titled 'Stairway to Heaven'

Dean Winchester's (Jensen Ackles) connection to the "Mark of Cain" and the "First Blade" continues to grow deeper in the remaining "Supernatural" Season 9 episodes. The promo videos released for the upcoming Episode 22 titled "Stairway to Heaven" proves it and Sam Winchester (Jared Padalecki) is not happy about it.

In the previous episode, the "Mark of Cain" and the "First Blade" helped Dean in killing Abaddon (Alaina Huffman) but in a really violent way. Sam Winchester witnessed Dean's brutal act so he called out to his brother and made him stop from losing control.

Sam noticed that the mark and the weapon are affecting Dean's behaviour. Sam even suggested that they should keep the "First Blade" someplace far away but Dean firmly said no.

The conflict between the Winchester brothers does not stop there. It is depicted in the first promo video for "Supernatural" Season 9, Episode 21 where Sam and Dean go on an argument whether they should bring the "First Blade" with them or not while dealing with the angel issues this time.

In the second promo video for the upcoming episode, viewers will continue to see how the mark and weapon affect Dean's behaviour. "Fun's just getting started," Dean stated with a violent look on his face while holding the "First Blade."

The second promo video also showed Metatron (Curtis Armstrong) declaring his regret on asking Castiel (Misha Collins) to lead an army of angels because they are now choosing to side with Castiel instead of him and the return of actress Lindsey McKeon who portrays Tessa "The Reaper."

According to the Hollywood Hills spoiler report, the angel-on-angel attack in Episode 22 will make Castiel ask for Sam and Dean's help again. Dean finds out that there is a conspiracy ongoing with Castiel's followers and Tessa will have a central role to play behind it all. Click HERE to see CW's promo photos from Episode 22.

"Supernatural" Season 9, Episode 22 "Stairway to Heaven" is scheduled to air on Tuesday night, May 13, at 9 pm ET on the CW Network. Have a look at the promo videos for the upcoming episode below.

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