Once, we believed our lives were sacred, that we had souls. Now we know we are mere machines; genetic data. We are science. But even as we learn, the properties of life remain uncertain. How does life acquire consciousness, or rights? Does a robot dream? If a person transforms into an oak tree, is it science or the work of gods? Did the Victorians find a way to resurrect the dead? To science, such questions are invitations to explore. Who better to explore with than the Doctor? "Life depends on change, and renewal". - Doctor Who: The Power of the Daleks by David Whitaker