A new enemy is set to wreak havoc in Beacon Hills in the premiere episode of "Teen Wolf" season 6.

Titled "Memory Lost," the episode will follow Scott McCall, Stiles Stilinski, Lydia Martin and the rest of the group as their lives turn dreary with the loss of their closest ally.

"Storm clouds gather as Scott and the pack head into their final months of high school. But the best days of their lives turn bleak when they lost their closest ally. Before the end, Scott and Lydia will stand alone against the growing darkness and fight to stop the destruction of everything and everyone they love," reads the official synopsis for the episode.

In his interview with Clevver TV, actor Tyler Posey, who plays Scott, teased a "wild hunt" when the show returns.

"We've got these things called the Ghost Riders and they come with a thing called the Wild Hunt. It's pretty creepy, right?" he said.

The actor went on to explain that the Wild Hunt is a supernatural storm that passes through Beacon Hills. The storm is full of Ghost Riders who are mostly gnarly cowboys who grab souls and take them to some other place.

According to Posey, something will happen that will prevent the Wild Hunt from leaving Beacon Hills.

In other news, showrunner Jeff Davis revealed recently that season 6 will be the last season of the show.

"When we realized this might be the last season, we wanted to make sure we brought back these relationships," he said, adding that they wanted Peter Hale back to see what happens to his relationship with Malia and Stiles.

"Teen Wolf" season 6 premieres on November 15 on MTV.