Fox is developing Them, an hourlong alien-themed project in the works from director Jonathan Mostow (Terminator 3) and screnwriters David Eick (Battlestar Galactica) and John McNamara (Profit), according to Variety.

Circle of Confusion's David Engel and David Alpert also are executive producing via CBS Paramount Network Television.

The project is based on the graphic novel Six, written by Michael Oeming and Daniel Berman. Eick and McNamara are writing the script for the TV take, executive producing with Mostow.

Mostow is attached to direct and executive produce the project, which could mark his first major foray into TV.

The premise of Them involves a sleeper cell of extraterrestrial terrorists who take the shape of humans. Their mission is compromised when they start experiencing human emotions, which act like a drug on the aliens.

"On a surface level, it's a really cool science fiction thriller," Mostow told Daily Variety. "But underneath, it's a very provocative show that's really going to explore what it means to be human, to be a person."