The new NBC drama focuses on a government conspiracy to hide a mysterious group of prisoners in Alaska.
"What I can tell you is that Simon is a government operative with mysterious ties to detainee leader Sophia (Laura Innes)."
He added that the character of Simon will link the show's various plot strands together.
"What's really cool is that there are all these rich, diverse, grounded characters inhabiting these very separate worlds," he explained. "They are all dealing with some critical personal dilemma which keeps it grounded, but Simon more or less becomes the bridge that connects all of the stories together."