<Table> <Tr> <Th_colspan="2"> The Librarians </Th> </Tr> <Tr> <Td_colspan="2"> Title card from the series' premiere episode </Td> </Tr> <Tr> <Th> Genre </Th> <Td> Adventure Fantasy </Td> </Tr> <Tr> <Th> Based on </Th> <Td> The Librarian by David Titcher </Td> </Tr> <Tr> <Th> Developed by </Th> <Td> John Rogers </Td> </Tr> <Tr> <Th> Starring </Th> <Td> <Ul> <Li> Rebecca Romijn </Li> <Li> Christian Kane </Li> <Li> Lindy Booth </Li> <Li> John Harlan Kim </Li> <Li> John Larroquette </Li> </Ul> </Td> </Tr> <Tr> <Th> Composer (s) </Th> <Td> Joseph LoDuca </Td> </Tr> <Tr> <Th> Country of origin </Th> <Td> United States </Td> </Tr> <Tr> <Th> Original language (s) </Th> <Td> English </Td> </Tr> <Tr> <Th> No. of seasons </Th> <Td> </Td> </Tr> <Tr> <Th> No. of episodes </Th> <Td> 42 (list of episodes) </Td> </Tr> <Tr> <Th_colspan="2"> Production </Th> </Tr> <Tr> <Th> Executive producer (s) </Th> <Td> <Ul> <Li> Dean Devlin </Li> <Li> Mark Roskin </Li> <Li> Noah Wyle </Li> <Li> John Rogers </Li> </Ul> </Td> </Tr> <Tr> <Th> Producer (s) </Th> <Td> <Ul> <Li> Paul F. Bernard </Li> </Ul> Geoffrey Thorne </Td> </Tr> <Tr> <Th> Production location (s) </Th> <Td> Portland, Oregon </Td> </Tr> <Tr> <Th> Cinematography </Th> <Td> David Connell </Td> </Tr> <Tr> <Th> Editor (s) </Th> <Td> Sonny Baskin Jeremy Bertstein Kate Rorick </Td> </Tr> <Tr> <Th> Running time </Th> <Td> 42 - 58 minutes </Td> </Tr> <Tr> <Th> Production company (s) </Th> <Td> <Ul> <Li> Kung Fu Monkey Productions </Li> <Li> Electric Entertainment </Li> </Ul> </Td> </Tr> <Tr> <Th_colspan="2"> Release </Th> </Tr> <Tr> <Th> Original network </Th> <Td> TNT </Td> </Tr> <Tr> <Th> Original release </Th> <Td> December 7, 2014 (2014 - 12 - 07)--February 7, 2018 (2018 - 02 - 07) </Td> </Tr> <Tr> <Th_colspan="2"> Chronology </Th> </Tr> <Tr> <Th> Related shows </Th> <Td> The Librarian </Td> </Tr> </Table> <Tr> <Th_colspan="2"> The Librarians </Th> </Tr>

How many seasons of the librarians is there
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