Nervous systems endow animals with cognition and behavior. To understand how nervous systems control behavior, neural circuits mediating distinct functions need to be identified and characterized. With superior genetic manipulability, Drosophila is a model organism at the leading edge of neural circuit analysis. In the cover image, two neurons are spun into the shape of a DNA double-helix, and a pair of Drosophila dance across them, suggesting the tightly-linked roles of neural networks and genetics in studying the mechanisms underlying neuronal development and behaviors in Drosophila melanogaster. See pages 959-968. (Cover image provided by Prof. Zefeng Gong).