<Table> <Tr> <Th_colspan="2"> Disappeared </Th> </Tr> <Tr> <Td_colspan="2"> Title card (season 6--present) </Td> </Tr> <Tr> <Th> Genre </Th> <Td> <Ul> <Li> True crime </Li> <Li> documentary </Li> </Ul> </Td> </Tr> <Tr> <Th> Presented by </Th> <Td> Christopher Walker </Td> </Tr> <Tr> <Th> Composer (s) </Th> <Td> David Varga </Td> </Tr> <Tr> <Th> Country of origin </Th> <Td> United States </Td> </Tr> <Tr> <Th> No. of seasons </Th> <Td> 8 </Td> </Tr> <Tr> <Th> No. of episodes </Th> <Td> 108 </Td> </Tr> <Tr> <Th_colspan="2"> Production </Th> </Tr> <Tr> <Th> Executive producer (s) </Th> <Td> <Ul> <Li> Benjamin Ringe </Li> <Li> Diana Sperrazza </Li> <Li> Elizabeth Fischer </Li> <Li> Knute Walker </Li> <Li> Sharon Scott </Li> </Ul> </Td> </Tr> <Tr> <Th> Producer (s) </Th> <Td> Various (show) <Ul> <Li> <Ul> <Li> Angela Martenez </Li> <Li> Benjamin Adams Trueheart </Li> <Li> Chris Gidez </Li> <Li> Courtney Engelstein </Li> <Li> Diamaris Welch </Li> <Li> Erika Beck Grothues </Li> <Li> Heather Walsh </Li> <Li> James Cozza </Li> <Li> Joe Bergan </Li> <Li> Jonathan Damour </Li> <Li> Keila Woodard </Li> <Li> Kimberly Weinstein </Li> <Li> Leslie Mattingly </Li> <Li> Lindsay Carswell </Li> <Li> Lloyd Fales </Li> <Li> Sara Burns </Li> <Li> Sarah Gregory </Li> <Li> Stephanie Angelides </Li> </Ul> </Li> </Ul> </Td> </Tr> <Tr> <Th> Running time </Th> <Td> 40 to 43 minutes (excl . commercials) </Td> </Tr> <Tr> <Th> Production company (s) </Th> <Td> Peacock Productions </Td> </Tr> <Tr> <Th_colspan="2"> Release </Th> </Tr> <Tr> <Th> Original network </Th> <Td> Investigation Discovery </Td> </Tr> <Tr> <Th> Picture format </Th> <Td> 480i (SDTV) 1080i (HDTV) </Td> </Tr> <Tr> <Th> Original release </Th> <Td> December 10, 2009 (2009 - 12 - 10)--present </Td> </Tr> <Tr> <Th_colspan="2"> External links </Th> </Tr> <Tr> <Th> Website </Th> <Td> investigationdiscovery.com/tv-shows/disappeared/ </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Disappeared </Th> </Tr>

Who is the narrator in disappeared on id