The Prodigal Son is a trilogy of dramas, ambitious as Sophocles', each of its own the first since Milton's "Samson" to attempt the scale and evocative power of ancient myth. "The Prodigal Son," the first, restates the Biblical parable in starkly contemporary fashion-the prodigal, having dissipated seven years, now diseased and the lone attendant in a house of prostitution, attempts passage into his father's heart through a substitute, Komos,...