|Spouse(s):||Thomas Walker (d. 2011)|
|Played by:||Afton Williamson|
|Last episode:||"Achilles Heel"|
Helen Walker is the widow of Corporal Thomas Walker, the Marine Two. Aware of his terrorist affiliations, Helen Walker initially agrees to cooperate with the CIA to apprehend her husband Tom. However, at a critical moment, she tips off Tom, allowing him to narrowly escape.
When Nick returned from captivity, she met with him in a park to ask about her late husband. When asked how he died, Nick simply tells her that he was beaten to death.
Later, she was seen at the funeral of her husband Thomas with her son and new husband Matt, then at Brody's House having a conservation with Jessica when it gets out of hand.
Later, she discovers that her husband Tom is alive and has been turned into a terrorist. Also he's been calling her when she and their son were not at home just to hear their voices. Later she talked to him and warns him about the FBI coming for him.