Dottie Underwood
Dottie Underwood is portrayed by Bridget Regan.
Agent Carter
Dottie was trained to become a Soviet operative by the Red Room Academy, a Soviet brainwashing program that would take young girls and mold them into doing whatever tasks given. Dottie would train physically and mentally learning hand to hand combat, tatical skills, acrobatics, and being adapt at using a firearm. Every night the girls would handcuff themselves to their beds. During one night she gained a friend in Anya, who she would later kill as part of their training exercise.
Sometime during WWII she joins the organization Leviathan, showing her loyalty by killing Pasha who refused to join. After WWII she meets Howard Stark under the alias of Ida Emke. He takes her to his warehouse where he shows off his prototype vehicles and airplane.
In 1946, she moves into the Griffith Hotel assuming her identity of Dorothy Underwood. She is introduced to Peggy Carter and Angie Martinelli. Later that evening she assassinates Ray Krzeminski and Jerome Zandow after ramming her car into theirs so Zandow won't reveal the secrets of Leviathan. Dottie kills Otto Mink after he attempts to assassinate Peggy Carter.
She breaks into Peggy's room and steals a photograph of Howard Stark's inventions. The next day she heads to the Dentistry office across the street from the SSR. She is interviewed by Seth Honicky who tries to get a sexual favor from Dottie. She kills him by stabbing him in the eye with a dental drill.
After Doctor Ivchenko is brought into the SSR, Dottie sends signals to him using a sniper rifle. He tells her to kill Peggy Carter. After Peggy is wanted by the SSR she is knocked unconscious by kissing Dottie using Peggy's Sweet Dreams Lipstick. Agents Sousa and Thompson takes Peggy into custody.
After purchasing a baby carriage for the Midnight Oil weapon, she returns the the dentist office to find Agent Sousa who she fights and escapes shooting and agent. She places the Midnight Oil Weapon into a movie theater and drives off with Ivchenko. They are stopped by a police officer who gives them the all clear because of Dottie playing innocent. As he walks away he hears his police radio giving a description of a woman who looks exactly like Dottie. She shoots the officer and drives off.
At Howard Stark's press conference, Dottie kills two police officers and another hypnotized one. They capture Stark and take him back to his warehouse. They make Howard fly his plane carrying Midnight Oil to the city but are interrupted by Agent Carter. Agent Carter and Dottie fight until Dottie is kicked out of a window and on a plane.
When Agent Carter returns, Dottie is nowhere to be found.