Agent Carter: A Marvel One Shot
Agent Carter starts at the terrible moment when Captain America's aircraft is crashing to the ground. She never heard from him again.
One year later, Agent Peggy Carter is working in data analysis and code breaking for Agent Johnn Flinn. When a call came on that The Zodiacs location has been found, Peggy does not get sent out into the field. She explains to Agent Flinn that she is bored and wants to help catch fugitives. She is brushed off and undermined by Agent Flinn and is told to let the boys do the work.
The men leave the office for a drink and another call comes in about The Zodiacs whereabouts. Although it is suggested to bring 3-5 men, Peggy goes solo. She effortlessly takes down everyone at The Zodiacs hideout.
At work the next day Agent Flinn is furious. He accuses Peggy of breaking protocol and tells her she was hired only out of pity because she was grieving.
Shortly after, Agent Flinn gets a phone call from Howard Stark (the man who made Captain America's shield and found the missing tesseract). Flinn is informed that Agent Carter will be running S.H.I.E.L.D. It was Flinn's job to give Agent Carter the news and to sound honored while doing so.
After Agent Flinn gives Agent Carter the news, he offers to help her with her belongings. Agent Carter replied, "as always I do not need your help".