Factual error: In season 2, they spend a lot of time at a Malibu Beach house. There are a few scenes across a few episodes when they are headed from Malibu into Los Angeles, but the scenes are shot on the coast in El Segundo, roughly 30 miles out of the way and definitely not a straight shot from Malibu.
Factual error: Harold Alexander, although his rank of major-general is correctly mentioned by the narrator, wears the rank insignia of a full general.
Factual error: In s01e08, "Q and A", when Yelena is playing chess, we see her use the touchscreen which represents the chessboard. However, the bottom left corner is a white square when it should be a dark square. The board is orientated incorrectly, even though the board on the floor isn't.