Four chapters represent the intense current effort to understand the way in which the mitochondrion controls the activation of the final stages of cell death. Another four articles attack the problem from the other side. How do specific insults in particular human or mouse neuro-degenerative diseases translate into mechanisms that will not only allow us to better understand what is happening in these patients but also, with luck, allow for development of more efficient and specific drugs in the future? Firstly, the concept of a central common cell death pathway, originally derived from...