Lyn Peterfield

Lyn Peterfield was a CIA agent in the 21st century.

Biography
At some point prior to Miracle Day, Peterfield had a relationship with fellow CIA agent Rex Matheson.

Later, Lyn was sent to help bring Jack Harkness, Gwen Cooper and Matheson back to America as part of a rendition. A cold-blooded killer, she was ordered by Brian Friedkin, a CIA official, to assassinate Jack Harkness. She attempted to do so by putting arsenic in Jack's cola, but was discovered by Rex and Gwen. She was then handcuffed while Gwen and Rex attempted to save Jack, but when they had almost succeeded she freed herself and attempted to prevent an antidote being given to Jack. Gwen knocked her unconscious when Lyn insulted her ancestry.

When Lyn returned to America, guards pretended to arrest her. Before she could attack Jack, Gwen and Rex, Rex, having been warned about an ambush, knocked out the guards in order to fee Jack and Gwen. Lyn then attempted to kill her former lover in hand-to-hand combat, but Rex broke her neck. However, she (initially) survived this due to Miracle Day, and soon after stumbled towards Esther Drummond's stolen car, her head twisted 180 degrees on her body, but Esther, Jack, Gwen and Rex drove away from her. (TW: Rendition)

Behind the scenes

 * Nepalese-born actress Dichen Lachman's casting in Miracle Day was actually one of the first to be confirmed in media, leading to initial suggestions that she would be a core cast member.