When Garth Ancier left NBC for the start-up FOX network, NBC head Grant Tinker told Ancier he was making a terrible mistake. "I will never put a fourth column on my schedule board," Ancier recalls Tinker telling him. "There will only be three." Today, fewer than twenty years later, FOX is routinely referred to as one of the "Big Four" television networks while more recent arrivals like UPN, PAX, and the WB strive to be number five. The Australian-born...