While it has been well documented that none of the superheroes from Marvel's The Avengers are featured in ABC's Marvel's Agents of S.H.I.E.L.D., the latest TV spot shows that one of the villains is present. In a blink-and-you'll-miss-it moment, one of the Chitauri, alien soldiers used by Loki in Marvel's The Avengers, is briefly showcased in this footage from creator Joss Whedon. Could this series feature another epic battle for New York City? We'll find out when the series debuts Tuesday, September 24 at 8 PM on ABC with the Pilot episode. In addition, we have 14 behind-the-scenes photos featuring the cast and crew of this highly-anticipated show.