Andrew Marlowe and Terri Edda Miller (Castle); Josh Berman and Allie Hagan (Notorious); Amblin TV's Justin Falvey and Darryl Frank (Bull); Shawn Ryan and Erik Kripke (Timeless); and FremantleMedia's Craig Cegielski all offer their views on how the US is struggling to meet the demand of international audiences for broader, close-ended, repeatable stories.