Continuity mistake: Dr. McKenna is wearing a blue suit and hat during the bus ride in the beginning of the movie and then again as the family board the wagon and set out for their hotel. When the wagon arrives at their hotel and everyone gets out, McKenna's suit and hat have suddenly switched to light gray.
Continuity mistake: Multiple errors with Bernard's stabbing. 1. The knife changes type after he is stabbed. 2. He is stabbed in the lower neck but the knife moves down into the middle of his back in later scenes. 3. The knife moves from his back to the ground without any noise at all. It's just there on the floor.
Continuity mistake: In the beginning, when the bus arrives in Marrakesh there is a small black car just in front of the bus. When the camera angle is changed the black car is suddenly gone.