Continuity mistake: In early versions of the episode, Luz is shown wearing her Hexside school uniform before she even receives it. This mistake spoils the ending. Fortunately, it was fixed later on. (00:00:01 - 00:00:40)
Episode #1.4 - S1-E4
Continuity mistake: When Weol-ju and the old lady are having a drink outside the supermarket, in the shot where she says "It seems like your parents raised you well", the position of her fingers change on the plastic cup she is holding when it cuts between different angles. In one shot, her fingers are placed along the side, but in the shot after, one finger is placed on the lid, then all fingers are placed on the side again. (00:09:35)
Visible crew/equipment: At the courthouse, while the Agents are in the room with the corpse, Hurstview stands behind an overturned potted plant. After Hurstview opens Skip's safe, just as Barnes and Long exit the room Hurstview moves his foot, and the actor's green tape mark is visible on the carpet at his feet. (00:20:00)
Continuity mistake: When Jonah confronts Meyer after the death of the surgeon, Meyer's holding a drink in his left hand as he turns to face Jonah. The shot changes angle and the drink is suddenly in his right. (00:48:40)
Visible crew/equipment: When Dani hands the spider back to Miles after he uses it to scare Flora, just after she says "Including me" and the spider moves from Dani's hand to Miles' hand, a red tape marker can be seen on the ground right under Victoria Pedretti's left foot. (00:34:09)