Plot hole: If night-blood is passed parent to child, there's no way for them to exist as all night-bloods die in conclaves before child bearing age.
Suggested correction: S5E1. Clark tells Madi:. " Until I figure this out, I want you to hide in your secret spot This is not up for discussion, Madi. The Flamekeeper scouts never found you there. Neither will they." This indicates that there were probably more nightblooods that never got found, therefore they could have passed it down to their children.
Character mistake: When Clarke gets to Becca's lab, her mom asks where the others are. She says that they are unloading the rover, but they got there by boat.
Suggested correction: She's asks "where's Roan" (not about the others) and Clarke says "he's unloading fuel with the others."
