<Tr> <Td_colspan="2"> ← Previous Season 2 Next → Season 4 </Td> </Tr> <Tr> <Td_colspan="2"> List of Legends of Tomorrow episodes </Td> </Tr> <P> The third season of the American television series Legends of Tomorrow, which is based on characters from DC Comics, premiered on The CW on October 10, 2017 and ran for 18 episodes until April 9, 2018 . The season follows the Legends, a dysfunctional team of time - traveling superheroes and anti-heroes, and their mission to correct anachronisms in time that they unintentionally caused . It is set in the Arrowverse, sharing continuity with the other television series of the universe, and is a spin - off of Arrow and The Flash . The season is produced by Berlanti Productions, Warner Bros. Television, and DC Entertainment, with Phil Klemmer serving as showrunners . </P> <P> The season was ordered in January 2017 . Production began that July and ended in February 2018 . Principal cast members Victor Garber, Brandon Routh, Caity Lotz, Franz Drameh, Maisie Richardson - Sellers, Amy Pemberton, Nick Zano, and Dominic Purcell return from previous seasons . They are joined by new cast members Tala Ashe and The Flash alum Keiynan Lonsdale . </P>

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