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It was also revealed in September that Hayley Atwell would reprise her role of Peggy Carter from ', ', and the Marvel One-Shot "Agent Carter", in the episode, ahead of starring in her own series, also titled "Agent Carter". A still image of Atwell's cameo was released on September 10, 2014, revealing that Neal McDonough and Kenneth Choi would also be appearing in the episode. They reprise their roles of Timothy "Dum Dum" Dugan and Jim Morita, respectively, from "Captain America: The First Avenger". McDonough also previously portrayed Dugan in the One-Shot "Agent Carter".