<Tr> <Td> National Geographic </Td> <Td> 2005 </Td> <Td> present </Td> </Tr> <Tr> <Td> 30 years </Td> <Td> 29 </Td> <Td> 48 Hours </Td> <Td> CBS </Td> <Td> January 2, 1988 </Td> <Td> present </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 28 years </Td> <Td> 29 </Td> <Td> The Edge of Night </Td> <Td> CBS </Td> <Td> April 2, 1956 </Td> <Td> November 28, 1975 </Td> <Td> 7,420 </Td> <Td> </Td> </Tr> <Tr> <Td> ABC </Td> <Td> December 1, 1975 </Td> <Td> December 28, 1984 </Td> </Tr>

This show aired on tv for 14 years