Factual error: Alex Peterson is continually referred to by everyone as the Secretary of Defence. This is an American title. The British equivalent is Secretary of State for Defence. "Defence Secretary" is used as an abbreviation; Secretary of Defence never is.
Episode #1.4 - S1-E4
Continuity mistake: DC Li is wearing a white crewneck sweater with a blue band on the neckline until this episode, when she is suddenly wearing a blue button-up shirt. All episodes take place on a single flight.