In nearly every scene in which a character is wearing glasses, the reflection of the lighting reflector panel can be clearly seen in the lenses. In many scenes, the actual camera lens is also visible.
In season 2, Matt Murdock claims he has never been north of 116th street. Columbia Law School, which he attended, is north of 116th street.
Karen explains that she can understand Elenas Spanish because of her taking it in high school. But her vocabulary and understanding of Elena far exceeds what Spanish you learn in high school. Despite having some difficulty finding the right words, her grammar and phrases are excellent.