'Supernatural' season 11 spoilers: Dean learns a valuable lesson; Castiel behaving differently in episode 11?

"Supernatural" season 11 episode 11, "Into the Mystic." Screengrabbed: YouTube/Television Promos

Another new episode of "Supernatural" season 11 airs tonight and fans should expect a series of violent deaths related to an eerie song.

According to the synopsis from Futon Critic, brothers Sam (Jared Padalecki) and Dean (Jensen Ackles) will dig deeper into the case of people who meet their demise in a violent manner after hearing a mysterious song.

Meanwhile, a scene (shown below) from the episode was released and it shows Dean talking to Hildred Harper (Dee Wallace), who advised him about the secret to a "long and happy life."

According to Hildred, the secret is to "follow your heart." "You do that, all the rest just figures itself out," she tells Dean. The scene ended rather funny, especially when Dean didn't expect something like that could happen.

When Dean does not hear about life lessons, he will also be busy dealing with Castiel (Misha Collins).

Elsewhere in the episode, Dean finds that there is something strange about Castiel, who appears to be behaving differently. Has the Devil taken control of his body? Based on the episode preview, Castiel is not his normal self that it was also seen how Dean told his brother that something was off about the angel.

Supernatural season 11 episode 11, "Into the Mystic." Screengrabbed YouTube/Television Promos

Another angel was also shown slowly walking behind Castiel as if ready to attack him and called him Lucifer. But Castiel/Lucifer had the upper hand and made the other angel disappear. Has Castiel lost his body to the Devil?

Fans will just have to wait for tonight's episode to get the answer. Another thing to watch out for in the upcoming episode is the attack on the Winchester brothers and a bloody Dean.

Titled "Into the Mystic," the next episode will have Wallace and Shoshannah Stern as guest stars.

"Supernatural" airs every Wednesday, 9 p.m. EST on The CW.

News
The first Christmas song to be sung in churches
The first Christmas song to be sung in churches

Every Christmas, people sing the song “While Shepherds Watched Their Flocks by Night”. Unlike many other songs and carols that include elements of non-biblical tradition and myth, this song is pure Scripture. It was the first Christmas song authorised to be sung in the Church of England. This is the story …

The story of the Christmas Truce of 1914
The story of the Christmas Truce of 1914

On Christmas Eve in 1914, many men were in the trenches fighting the war, but the spirit of Christmas halted the conflict for a brief period. This is the story …

Report highlights injustices experienced by Christians in the Holy Land
Report highlights injustices experienced by Christians in the Holy Land

Jerusalem Church leaders have released a report detailing the struggles and challenges currently faced be Christians living in the Holy Land.

Have you lost the wonder of Christmas?
Have you lost the wonder of Christmas?

For you who have been followers of Jesus Christ for a long time, maybe the pain and suffering of this world and the darkness you have had to live through this past year has gotten you down to the point of complete and utter discouragement. But all is not lost.