'Teen Wolf' season 6 episode 5 spoilers: Stiles returns in 'Teen Wolf' and he meets an old acquaintance

The Ghost Riders of the Wild Hunt may have gone through the town of Beacon Hills and erase people from existence, but their victims aren't exactly dead. And it may be a matter of time before some of them decided to fight back.

As shown in the trailer for "Teen Wolf" season 6 episode 5, Stiles (Dylan O'Brien) is back. And guess who he meets in this place hovering between existence and nonexistence? The big bad Werewolf himself — Peter Hale (Ian Bohen).

Peter seems astonished that no one was looking for him despite the fact that he has been missing for three months. That's when Stiles explained to him that they were taken by the Ghost Riders and Peter appears to know something about these mysterious creatures.

After learning that he has been taken by the Ghost Riders, Peter felt demoralized, but Stiles refused to give up hope that they could find a way to escape this old abandoned train station. Stiles may be optimistic, but Peter pointed out that the place they are being held right now isn't real. "Beacon Hills doesn't have a train station," Peter said.

The victims may feel hopeless, but some people on the outside are still looking for ways to remember the love ones that were taken from them. As shown in this teaser, Lydia (Holland Roden) is not giving up in her quest to find Stiles, and she decided to visit Stiles' parents, Noah (Linden Ashby) and Claudia (Joey Honsa), and asked them about the abandoned blue jeep she found with Scott (Tyler Posey) and Malia (Shelley Hennig).

Unfortunately, Lydia didn't learn much from her visit as Claudia revealed that she hasn't seen the jeep in almost 18 years. Can Lydia find a way to remember Stiles like she promised? Can Peter and Stiles work together to look for a way out? Find out when "Teen Wolf" season 6 episode 5 airs on Tuesday, Dec. 13, at 9 p.m. ET on MTV.