"Agent Carter" is set to air back-to-back episodes next week with "Life of the Party" and "Monsters." In the upcoming episodes, Peggy Carter recruits a former adversary and asks for her help in defeating a new enemy.

This season, Peggy has had her hands full with trying to save Dr. Jason Wilkes and at the same time investigating the dark and mysterious substance known as Zero Matter. Whitney Frost, who was exposed to the deadly substance, has chosen to embrace the power that it has given her – making her a very challenging enemy for Agent Carter.

As Whitney continues to pursue the deadly Zero Matter, Peggy realizes that she is unable to save Wilkes on her own. Peggy turns to Dorothy "Dottie" Underwood, the Soviet assassin that was part of Johann Fennhoff's revenge plot on Howard Stark. Underwood was last seen in season 1 as she was taken away and put into FBI's custody.

In the promo for the upcoming episode, Peggy is seen entering prison and comes face-to-face with her former adversary. Given their history, Peggy is hesitant to ask for help while Dottie is thrilled that Peggy has come to her.

"The reason for your visit is pretty obvious. You need my help," Underwood says in the promo.

The promo also gives a quick look into James' and Underwood's terse reunion and Peggy giving her instructions on her new target – Whitney.

The action continues in "Monsters," where Peggy must plot out a rescue mission for Wilkes. In the episode, Jarvis also realizes the consequences when he is unable to keep his promises. Meanwhile, Whitney continues to be on the hunt for even more dark power.

To see the action and a boat load of surprises, be sure to tune in to the special two-hour event airing on Feb. 16.

Season 2 of "Agent Carter" airs every Tuesday at 9 p.m. on ABC.