<Table> <Tr> <Th_colspan="2"> Legends of Tomorrow </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Genre </Th> <Td> <Ul> <Li> Superhero fiction </Li> <Li> Action </Li> <Li> Science fiction </Li> </Ul> </Td> </Tr> <Tr> <Th> Based on </Th> <Td> Characters from DC Comics </Td> </Tr> <Tr> <Th> Developed by </Th> <Td> <Ul> <Li> Greg Berlanti </Li> <Li> Marc Guggenheim </Li> <Li> Andrew Kreisberg </Li> <Li> Phil Klemmer </Li> </Ul> </Td> </Tr> <Tr> <Th> Starring </Th> <Td> <Ul> <Li> Victor Garber </Li> <Li> Brandon Routh </Li> <Li> Arthur Darvill </Li> <Li> Caity Lotz </Li> <Li> Franz Drameh </Li> <Li> Ciara Renée </Li> <Li> Falk Hentschel </Li> <Li> Amy Pemberton </Li> <Li> Dominic Purcell </Li> <Li> Wentworth Miller </Li> <Li> Matt Letscher </Li> <Li> Maisie Richardson - Sellers </Li> <Li> Nick Zano </Li> <Li> Tala Ashe </Li> <Li> Keiynan Lonsdale </Li> </Ul> </Td> </Tr> <Tr> <Th> Composer (s) </Th> <Td> <Ul> <Li> Blake Neely </Li> <Li> Daniel James Chan </Li> </Ul> </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> 51 (list of episodes) </Td> </Tr> <Tr> <Th_colspan="2"> Production </Th> </Tr> <Tr> <Th> Executive producer (s) </Th> <Td> <Ul> <Li> Chris Fedak </Li> <Li> Sarah Schechter </Li> <Li> Phil Klemmer </Li> <Li> Andrew Kreisberg </Li> <Li> Marc Guggenheim </Li> <Li> Greg Berlanti </Li> </Ul> </Td> </Tr> <Tr> <Th> Producer (s) </Th> <Td> <Ul> <Li> Grainne Godfree </Li> <Li> Sarah Nicole Jones </Li> <Li> Glen Winter </Li> <Li> Vladimir Stefoff </Li> </Ul> </Td> </Tr> <Tr> <Th> Location (s) </Th> <Td> Vancouver, British Columbia </Td> </Tr> <Tr> <Th> Cinematography </Th> <Td> David Geddes Mahlon Todd Williams </Td> </Tr> <Tr> <Th> Editor (s) </Th> <Td> <Ul> <Li> Kevin Mock </Li> <Li> Andrew Kasch </Li> </Ul> </Td> </Tr> <Tr> <Th> Camera setup </Th> <Td> Single - camera </Td> </Tr> <Tr> <Th> Running time </Th> <Td> 42--45 minutes </Td> </Tr> <Tr> <Th> Production company (s) </Th> <Td> <Ul> <Li> Berlanti Productions </Li> <Li> DC Entertainment </Li> <Li> Warner Bros. Television </Li> </Ul> </Td> </Tr> <Tr> <Th> Distributor </Th> <Td> Warner Bros. Television Distribution </Td> </Tr> <Tr> <Th_colspan="2"> Release </Th> </Tr> <Tr> <Th> Original network </Th> <Td> The CW </Td> </Tr> <Tr> <Th> Picture format </Th> <Td> HDTV 1080i </Td> </Tr> <Tr> <Th> Audio format </Th> <Td> Dolby Digital 5.1 </Td> </Tr> <Tr> <Th> Original release </Th> <Td> January 21, 2016 (2016 - 01 - 21)--present (present) </Td> </Tr> <Tr> <Th_colspan="2"> Chronology </Th> </Tr> <Tr> <Th> Related shows </Th> <Td> Arrowverse </Td> </Tr> <Tr> <Th_colspan="2"> External links </Th> </Tr> <Tr> <Td_colspan="2"> Website </Td> </Tr> <Tr> <Td_colspan="2"> Production website </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Legends of Tomorrow </Th> </Tr>

How many episodes of dc legends of tomorrow are there