"We can't ever say 'mutant,' Tancharoen said, when asked about the rules the show must abide by.
"There's a database that's tailored to our show with the properties we can use as well as the properties that are owned by other studios and things that are flagged for major franchises," Whedon said. "There are certain areas we can't go because we don't want to step on the toes of the movies. We've had free reign. There are certain rules in terms of the Marvel brand. Marvel is very focused on being grounded -- and it is our world with the one twist that they're superheroes. There's no Metropolis, there's no Gotham. It's New York City and Chicago, and in the cinematic universe the process of powers is pretty young. They say it's only been a couple years since Iron Man in terms of our timeline in the universe. So the idea in our world that powers exist is new to the population and SHIELD's job description. It used to be keeping those things secret and that has now changed, so we're dealing with some of that."