“The 100” Season 2 finale will put everyone in danger. In new sneak peek videos, it’s clear that Lexa’s (Alycia Debnam-Carey) betrayal will have a major effect on Clarke’s (Eliza Taylor) plan. She’ll still try to storm Mount Weather on her own, but someone will stop her. Meanwhile, Jasper (Devon Bostick) tries to come up with his own plan.

Sneak Peek No. 1

Octavia (Marie Avgeropoulos) can’t find a way out of the area she's stuck in, and it’s getting more disturbing by the second – especially when a dead body comes out of a trash chute. Soon after Clarke comes around a corner and discovers that Octavia didn’t retreat when the Grounders left.

“Of course I stayed,” Octavia says. “I know where my loyalties lie.”

Clarke explains that Lexa backed out of their alliance and made a deal with Mount Weather for the Grounders’ safety. Lincoln (Ricky Whittle) was forced to go with them, and now they are on their own. Without a plan, Clarke wants to shoot the keypad of the door, and Octavia is shocked that he thinks that could work. She can’t waste her opportunity to save her friends on an escape plan that she has barely thought through.

“Bellamy is counting on you,” Octavia says. “Everyone’s always counting on you.”

“What do you want from me?!” Clark yells.

“You trusted Lexa,” Octavia explains. “You let a bomb drop on Ton DC. You let all of those people –”

“I am doing the best I can!” Clarke shouts.

“Yeah, well, it’s not good enough,” Lexa says.

Watch the first sneak peek video from “The 100” Season 2 finale below:

Sneak Peek No. 2

Octavia eventually finds a way to get into Mount Weather. In the second sneak peek clip, she is with Jasper and Maya (Eve Harlow), but they’re not making a run for it. Maya may have helped Octavia get in, but Cage (Johnny Whitworth) already knows what she did.

“Cage knows I helped you guys,” Maya says. “He’s on Level Five.”

“So what do we do?” Octavia asks.

Jasper apparently isn’t ready to leave just yet. “We kill Cage,” he says.

Watch the second sneak peek video from “The 100” Season 2, episode 16 below:

Sneak Peek No. 3

Bellamy (Bob Morley) begs Dante (Raymond J. Barry) for help at the last minute in this short clip. “Please, we need a way to get all our people out of this mountain without killing anyone,” Bellamy pleads.  

Watch the third and final sneak peek video for “The 100” Season 2 finale below:

“The 100” Season 2 finale, titled “Blood Must Have Blood, Part 2,” airs Wednesday at 9 p.m. EDT on the CW.