Release date: September 24, 2013
The story: Despite being a key figure in the events of Captain America: The First Avenger, SSR Agent Peggy Carter is still underestimated by her colleagues and gets stuck behind a desk while the male agents go off and do exciting missions. Frustrated by the rampant misogyny, Peggy decides to find a mission of her own and tries to track down a mysterious object known as Zodiac. After beating up a bunch of goons, Peggy recovers Zodiac and returns to the SSR, only to be chewed out by her jerk boss for disobeying his instructions. Before she has to endure too many sexist insults, though, Howard Stark calls and announces that he’s starting an organization called S.H.I.E.L.D. and he wants Peggy to help him run it.
Noteworthy events: Though the status of the Agent Carter short in the MCU canon may seem questionable, nothing about it specifically contradicts anything that happens in the Agent Carter TV series. That means the show probably takes place at some point in the middle of the short, after Peggy returns to the SSR but before S.H.I.E.L.D. is formed.