Continuity mistake: When Emily enters the room her son is wearing sneakers, then he isn't, and then again he is. (00:14:35)
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)
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.
