Hooked on the Naked Scientists? This week we're looking into the science of addiction, finding out how smoking alters the teenage brain, why a mixture of brain chemistry and psychological habits make drugs hard to kick, and how addiction re-wires the brain in a similar way to school. Also, how a good night's sleep could stave off diabetes, why traffic pollutes your IQ and why your next prescription could be a placebo! Plus we bring you the first in our series of Rising Stars, young researchers reporting from the coalface of science, and in Kitchen Science we show you how to levitate a squid!