The “Teen Wolf” gang has an escape mission to finish, but they might need their own rescue team soon. In episode 15, the pack tried to save Lydia (Holland Roden), but Stiles’ (Dylan O’Brien) plan didn’t go so well. The hour ended on a cliffhanger with Eichen House in lockdown, and episode 16 will pick up right after that.

“Trapped in Eichen House with Theo [Cody Christian] and his Chimera Pack, Scott [Tyler Posey] must try to rescue Lydia before it’s too late,” the MTV synopsis reveals. Scott will have obstacles to overcome though. Theo and his pack can easily walk through the mountain ash that surrounds the ward Lydia is being held in. Scott will have to find a way to get past the magical substance or hope that Stiles can save Lydia on his own.

The lockdown seems to heighten the pack’s powers, so that could help Scott break through the barrier — but it also puts his pack in danger. Kira (Arden Cho) still doesn’t fully understand her powers. She could lose control and hurt herself or someone else.

The trailer for episode 16 shows that the good guys might need to team up with an enemy. Though Scott initially turned down Theo’s help, the chimera might be their only hope. In the promo video for the episode, titled “Lie Ability,” Theo claims he is the only one who can find Lydia – who apparently goes missing with Dr. Valack (Steven Brand). “I’ve got her scent,” Theo explains. “I can find her, you can’t.”

Watch the promo video for “Teen Wolf” Season 5B, episode 16 below:

It looks like the gang will finally get the banshee out of the mental hospital this week. Roden teased that Lydia would finally have some romance, and that doesn’t seem likely if she were still stuck with Dr. Valack. “I feel like I always get in trouble with the Lydia romance questions,” she teased to Hollywood Life. “I can say that there are some romantic scenes for Lydia this season, but I cannot say with who.”

“Teen Wolf” Season 5B, episode 15 airs Tuesday at 9 p.m. EST on MTV.