This episode on 'attention' is shot in the attention-demanding city of Las Vegas. Our guide for this episode's journey into the brain will be master magician David Copperfield, whose stock and trade is manipulating an audience's attention to produce amazing illusions. Magicians like David understand the psychology of the human mind as well as any lab scientist, and we will find out how they use this knowledge of the brain to perform their tricks. And our scientific experts will draw on their insight into attention to create illusions rivaling those of master magicians. Believe it or not, the bottleneck of attention that filters the flood of stimuli entering the brain is so limited that a gorilla can walk through the room right in front of your eyes and you won't even see it. Prepare to be amazed!