A mobster walked into a psychiatrist's office ... No, it wasn't the start of a joke: it was the start of a program that changed TV history. By shattering preconceptions about the kinds of stories the medium should tell, The Sopranos launched our current age of prestige television. Television critics Alan Sepinwall and Matt Zoller Seitz were among the first to write about the series before it became a cultural phenomenon. To celebrate the twentieth...