Marvel's Agents of S.H.I.E.L.D. executive producers Jed Whedon and Maurissa Tancharoen, who co-created the series with Marvel's The Avengers director Joss Whedon, recently gave an extensive interview where they teased the villains in the series and much more. Here's what Jed Whedon had to say about the villains and the spy aspect of the show.

"There are gods and aliens. So we have a lot to play with. There's a spy aspect of the show and SHIELD is some of the most sci-fi in the Marvel universe because it's about gadgets. So we have a lot of different things to play with. It will be a mixture of both. We will be focusing on having every story having a beginning, middle and end, but some of it will be mythology and some of it will standalone. And our character runs will continue through all of that."

When asked whether the series will be a "case of the week" type of procedural, Maurissa Tancharoen had this response.

"The cases will have a beginning, middle and end, but we are focused on the serialized nature of our characters and there will be mythology woven throughout the season with little bits and pieces."

Jed Whedon also talked about the return of Marvel's The Avengers stars Clark Gregg as Agent Coulson and Cobie Smulders as Agent Maria Hill.

"We're bringing back Coulson and there's a question mark as to how that happened. We don't want people to feel like we disregarded The Avengers. We thought it was important for his character to show that this isn't some spinoff. This exists in the world and he's the same guy. Plus we like Cobie."

Maurissa Tancharoen added that they are taking Coulson's resurrection very seriously

"Having characters like Agent Maria Hill legitimizes his return, as well as the show, right from the top. This isn't some spinoff. We're taking this seriously. We're paying respects to what did happen in previous movies and we're not disregarding any of that. This is a new story we're telling from that point onward."

Jed Whedon commented on the possibility of Marvel's The Avengers stars appearing in the series.

"We're in contact with the features people, and we're hoping to tie in with storylines since we have stuff in their films and play with the fallout of their films. But we are focused on establishing ourselves as our own franchise and getting people to fall in love with our characters instead of just wondering when Iron Man is going to fly in."

CLICK HERE to read the full interview with Jed Whedon and Maurissa Tancharoen. Marvel's Agents of S.H.I.E.L.D. debuts tonight, Tuesday, September 24 at 8 PM ET on ABC.