Back in May, we reported that Captain America: The First Avenger star Hayley Atwell is starring in the next Marvel One-Shot short film. Today, we have the first poster and photos for Marvel One Shot: Agent Carter, which will be included on the Blu-ray and DVD release of Iron Man 3 on September 24. The short is set in the 1950s, after the events of Captain America: The First Avenger, where Peggy and her fellow SSR agents must deal with a new threat dubbed Zodiac. Take a look at the images, then read on for more details from director Louis D'Esposito.

Louis D'Esposito explained that Agent Carter has much more action than the previous short, Item 47.

"First of all it's a period piece. You have three fight scenes as opposed to Item 47, where we just had basically one action scene. We had five days - one more day than we did on Item 47 but I think it's double in size. And also the visual style of it, that requires time. So there was pressure on us. I have people looking over my shoulder, looking at the watch saying, 'Come on, you're costing us a lot of money!'"

The story also offers a bridge between Iron Man 3 and the upcoming Captain America: The Winter Soldier, with Dominic Cooper reprising his Captain America: The First Avenger role as Howard Stark, Tony Stark's father. Louis D'Esposito revealed the short is set one year after Captain America: The First Avenger, featuring a new villain named Zodiac.

"It's a year since Cap plunged into the ocean. And in our mind, we said there's a few SSR offices. If you want to relate it to now, it's like the OSS, the precursor to the CIA. The SSR is the precursor to S.H.I.E.L.D. There's some satellite offices in New York and right now their primary concern is getting Zodiac. Zodiac in the books has been many many different things. We just want you to know it's deadly, it's important, bad guys are guarding it, and it's imperative she gets it."