Continuity mistake: When Emily enters the room her son is wearing sneakers, then he isn't, and then again he is. (00:14:35)
Continuity mistake: Early in the episode as she is on a fire escape looking to hide somewhere, the window she opens from the outside has two half panes of glass, but on the inside it only has one pane of glass.
Revealing mistake: The scene is set in Boston, MA, USA, but at a murder location, a European-style circular power outlet is visible through the glass doors at the bottom of the concrete wall. (00:01:20)
Continuity mistake: In episode 2 of the series she turns the light off before they go upstairs. In this episode we see that scene again, but this time she doesn't turn off the light. (00:37:40)