Hayley Atwell is returning to the MCU in Avengers: Doomsday. Atwell made her Marvel Cinematic Universe debut in 2011's Captain America: The First Avenger, where she played Peggy Carter/Agent Carter.

Marvel’s second TV series on ABC tracks the exploits of Agent Peggy Carter, played by Hayley Atwell, last seen in Captain America: The Winter Soldier. Marvel One-Shots: A 5-minute oral history ...