Continuity mistake: In this episode Nadia Santos tries to find out who's the baby that her mother Irina Derevko is holding on a picture. She first shows it to Jack Bristow and later to Arvin Sloane. Later Jack asks to see to picture again and tells Nadia it's Irina's niece. At the several moments the picture is visible the picture is flipped, showing the baby on the left arm or right arm of Irina. (00:29:55 - 00:36:35)
Trivia: Throughout the show, the number 47 appears many times. There are multiple room 47's (where Syd found the Circumference in season 1 and the room in her memories from season 3, among others.), there are 47 Rambaldi artifacts, and page 47 of the Rambaldi manuscript was the page that had Sydney's picture on it.