DISCOVERY CHANNEL launched in 1985 and is one of the most widely distributed cable networks today. Its dedication to top-quality nonfictional and reality programming—typically on themes of popular science, nature, history, and geography—has won the channel several Emmy nominations and awards. One of its most popular programs, Deadliest Catch (2005– ), focuses on several crab fishing crews. The drama comes from the nail-biting action on the fishing vessels, but the interpersonal relationships—and rivalries—among cast members provide juicy story lines.