While Nolan and Emily may have no romantic interest in each other, they're still meant to be. As pseudo-siblings.
"Nolan sees David Clarke as a de facto father figure and [Emily] didn't get the benefit of knowing her father as an adult. They both think of each other like family, so no matter what we throw at them, they're going to remain connected."
Are you into the Nolan+Emily = brother/sister vibe?
Source: TV Guide