According to wikipedia, the three largest national television networks in South Korea are KBS (Korean Broadcasting System) , MBC (Munhwa Broadcasting Corporation), and SBS (Seol Broadcasting System).
KBS is South Korea's main public broadcaster and is best known for it's nightly newscasts and historical dramas. Some dramas include "Chuno" and "The Vineyard Man". This network receives funding from the Korean Government but is independently managed. KBS World is the international television and radio service of KBS. It was launched on July 1, 2003. KBS World television is administered over several international communication and broadcasting satellites.
MBC, one of three major national South Korean television and radio networks, was established in 1959 in Busan, South Korea. It currently operates 19 regional stations with over 4,000 employees. The program guide includes drama, entertainment, news and sports.
SBS is the only private commercial broadcaster with a wide regional network to operate in the country. It launched its first U.S. channel in August 2004. Some drama programs given on this network include "Temptation of a Wife", "Golden Bride", and "Swallow the Sun".
All three networks have produced historical dramas in recent years. For more information on the media and television networks of South Korea, visit PressReference.com
According to The New York Times, due to a high magnitude of censorship, television in North Korea is not the same as South Korea. Radio and television sets are sold pre-tuned to government stations and radios must be checked and registered by police before usage. There are only four television stations: Korean Central TV, Mansudae Television, Korean Educational and Cultural Network, and Kaesong Television. According to recent UN data, only 55 of every 1,000 North Koreans have a television in their home. As a result of the economic conditions of the country, radio is used the most.