Now, Our State, Carolina Outdoor Journal, Exploring North Carolina, North Carolina Bookwatch with D. G. Martin, and special programs about the state's history and culture. It also produces The Woodwright's Shop, Growing a Greener World, The Zula Patrol, and Song of the Mountains for national distribution. In addition to PBS and American Public Television programs and local productions, the station also runs programming from the United Kingdom, including "Britcoms" on Saturday evenings and the soap opera EastEnders on Sunday evenings. In the 1990s, UNC-TV introduced "Read-A-Roo," a kangaroo used as the mascot for the network's children's programming. PBS North Carolina airs its own public affairs programming on Sunday mornings. Stations PBS NC operates twelve stations that relay its programming across the entire state as well as into portions of Virginia, Tennessee, Georgia, and South Carolina. Each station's callsign consists of "UN" for the University of North Carolina, followed by a letter assigned sequentially in the order in which it was activated, except for the first station. Notes Digital television Digital channels PBS NC's current over-the-air digital configuration, which is multiplexed among three subchannels, was introduced on September 25, 2008. On that date, UNC-TV revised its subchannel lineup on its stations, reducing the number of channels to three: UNC-TV (the main channel of each station, which now carries high definition programming), and the standard definition-only services UNC-KD and UNC-EX ("The Explorer Channel"). UNC-TV HD and UNC-EX are also available to DirecTV customers with MPEG4-compatible receivers. Prior to February 1, 2016, Time Warner Cable customers also received UNC-MX (described as "an eclectic mix of programming for adults") in standard definition; the North Carolina Channel has since replaced UNC-MX on Time Warner Cable systems. Prior to November 1, 2009, the third subchannel was named UNC-NC. This configuration is used for WUNC, WUND, WUNF, WUNG, WUNJ, WUNK, WUNL, and WUNU: An alternate configuration is used for WUNE, WUNM, WUNP, and WUNW. The original purpose for this was to obtain must-carry status for UNC-KD since those are secondary stations in their respective markets. On June 15, 2010, UNC-KD switched subchannels with UNC-EX on the four stations previously mentioned, which transferred UNC-KD's must-carry status to UNC-EX. Subscribers of Charter Spectrum, the major cable provider in the state, have direct-fiber optic versions of each of PBS North Carolina's networks rather than an antenna feed of their local station, as Spectrum forerunner company Time Warner Cable built out