Peggy discovers her murder investigation has huge ramifications that can destroy her career, as well as everyone near and dear to her.

As Jarvis' precision and quick-thinking skills are put to the ultimate test, Peggy must find a way to stop an atomic explosion that threatens to destroy all of California.

When Agent Peggy Carter realizes she cannot save Wilkes on her own, she turns to her most unexpected adversary for help, while Whitney makes a move to control the deadly Zero Matter.

As Agent Carter plots a rescue mission, Whitney Frost hunts for even more dark power, and Jarvis learns not to make promises he cannot keep.

Peggy and Sousa propose a trade with Whitney Frost, while the SSR gets help from Howard Stark that may be the key to eliminating Zero Matter.

Peggy desperately tries to save Dr. Wilkes with a dangerous plan to stop Whitney Frost. But Thompson makes a surprising move that could destroy them all.

Peggy needs Howard Stark to eliminate Zero Matter as they are faced with a mission none of them could come back from.