Captain America: The First Avenger
One year after the events of "Captain America: The First Avenger", Agent Peggy Carter, now a member of the Strategic Scientific Reserve, is stuck compiling data instead of working field cases. One night while alone in the office, the case line rings, informing Carter of the location of the mysterious Zodiac. She goes to the location, and is able to retrieve the serum single-handedly. The next day, her boss, Agent John Flynn, reprimands her for not going through the proper procedures to complete the mission. Carter explains that the mission was time-sensitive, but Flynn is unmoved, dismissing the indignant Carter as an "old flame" of Captain America's who was given her current job out of pity for her bereavement. The case line rings again, this time with Howard Stark on the other end, who tells Flynn to inform Carter that she will co-head the newly created S.H.I.E.L.D. In a mid-credit scene, Dum Dum Dugan is seen poolside with Stark, marveling at two women wearing the newly created bikinis.