Have you ever wondered what would happen if Travis Bickle participated in the plot of Perfume? Wonder no more, for "Sense Memory" provides a reasonable approximation. Prentisspalooza rolls on as Prentiss is curious about her apartment's security, we meet an important side character, and we're subject to an incomprehensible flashback. Meanwhile, Ronnie managed to cut out all of his coughing from the episode so as to trick the listener into thinking he's not dying of consumption.