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Neutral hydrogen images can help distinguish between growth by mergers and accretion of gas, and between inflow and outflow. While these images have taught us a lot about galaxy evolution in the local universe very few HI imaging observations have been done beyond z=0.1. The recent upgrade of the VLA has now made it possible to go as far as z=0.5. CHILES the COSMOS HI Large Extragalactic Survey, is an ongoing pencil beam survey of one pointing in the COSMOS field covering the range of 0<z<0.5. I will discuss the goals, challenges and the very first results of this survey.