The Supergirl episode “Call to Action” suggests that Nia Nal may already know the reason for her narcolepsy, reports Inverse.

In Episode 6, Kara and James find Nia asleep at her desk at work, she’s startled awake and explains that she has “that sleep thing, the one that causes you to fall asleep at random times.” She had a doctor in DC to treat her narcolepsy, but she hasn’t found anyone in National City yet.