Continuity mistake: When the woman falls near the beginning, her arms are out to her side, almost making a T shape, even after she stops moving. In the next shot, her arms are down by her side.
Continuity mistake: When the couple is in the boat when the creature appears, the woman is taking a picture and holding her phone in her left hand, she turns around and her left hand is raised and her right hand is on the boat edge. When the camera angle changes, her left hand is now on the boat and her right hand is lowered and holding the phone (confirmed when the camera angle changes again and she's in the same position, holding the phone in her right hand).
Map of the Seven Knights - S5-E10
Factual error: The Czech crime database (which appears to be an official Czech database) is headed 'Czechoslovakia'. Czechoslovakia has not existed since the Czech Republic and Slovakia separated in 1993 and neither country uses the term any more.
Continuity mistake: When Marwan Hanano stops the basketball with his foot, his feet are facing the court, so his left foot is almost perpendicular to the concrete strip. In the next shot, with his right foot still on the ball, his left foot changes position, so it's nearly parallel with the concrete strip.
Continuity mistake: When Monroe plays back the video of Wu, Wu tilts his head over after he drops his hand. However, in the original scene Wu never moves his head. (00:36:35 - 00:37:55)