Casting director Nina Gold takes us inside the audition room and reveals what she looks for when searching for the right actors for some of today's biggest productions. Gold discusses casting Nick Mohammed and Gary Oldman on “Slow Horses,” what it takes to cast the young actors at the center of “Narnia: The Magician's Nephew.” Gold also shares advice for actors on self-tapes, preparation, audition red flags, working opposite major stars, and making a lasting impression in the casting room.