At about the 32 minute mark, when Antony and Cleopatra are arguing about what to do about Atia's arrival in Alexandria, just before Cleopatra starts throwing things at Antony the body slave Charmian can be seen behind Antony, on the opposite side of him from Cleopatra. A moment later when Cleopatra actually throws something, Charmian is on the other side of the room behind Cleopatra.