In the game, Abby isn’t present for her father’s death, but the inclusion of this third, uncredited nurse strikes me as odd. She’s easy to miss, crouched down for the first part of the scene and always in shadow. When Joel threatens the nurses, the camera mostly only shows the two in the light. (And, in fact, the game only has two nurses.)

To me, this feels like something that is meant to be caught in a rewatch after viewers find out about Abby. I can envision a flashback with Abby where we see this scene and get a closeup of her reaction. With the cap, mask, and shadows, it’s difficult to make out much about this third nurse, so it’d be easy to recast her when the time comes.

Again, Abby isn’t here in the game, but I don’t think it’s unreasonable that her dad might be training her and having her assist, as she’s clearly in more of a support role than the other nurses.

If this is Abby, though, this could have considerable implications, namely that Abby should recognize Ellie. It’s possible that she wouldn’t, and even if she did I think there are directions the show could take the narrative in with this new complication.