Sensory Regeneration in the Inner Ear: History, Strategies and Prospects -- Non-mammalian Hair Cell Regeneration: Cellular Mechanisms of Morphological and Functional Recovery -- Cell Junctions and the Mechanics of Hair Cell Regeneration -- Mammalian Hair Cell Regeneration -- Specification and Plasticity of Mammalian Cochlear Hair Cell Progenitors -- Inner Ear Cells from Stem Cells - a Path Towards Inner Ear Cell Regeneration -- Spiral ganglion neuron regeneration in the cochlea: regeneration of synapses, axons and cells -- Genetic and Epigenetic Strategies for Promoting Hair Cell Regeneration in the Mature Mammalian Inner Ear.