48 Hours is an American documentary/news magazine television series broadcast on CBS. The series has been broadcast on the network since January 19, 1988. The program airs Saturdays at 10:00 p.m. Eastern and Pacific Time, as part of the network's placeholder Crimetime Saturday block; as such, it is currently one of only two remaining first-run prime time programs (excluding sports) airing Saturday nights on the major U.S. broadcast television networks (along with Univision's Sabadazo). The program sometimes airs two-hour editions or two consecutive one-hour editions, depending on the subject involved or to serve as counterprogramming against other networks.