<Table> <Tr> <Th colspan="2"> `` Crisis on Earth - X '' </Th> </Tr> <Tr> <Td colspan="2"> Arrowverse crossover event </Td> </Tr> <Tr> <Td colspan="2"> Promotional poster </Td> </Tr> <Tr> <Th> Episode nos . </Th> <Td> <Ul> <Li> Supergirl ( part 1 ) </Li> <Li> Season 3 , Episode 8 </Li> <Li> Arrow ( part 2 ) </Li> <Li> Season 6 , Episode 8 </Li> <Li> The Flash ( part 3 ) </Li> <Li> Season 4 , Episode 8 </Li> <Li> Legends of Tomorrow ( part 4 ) </Li> <Li> Season 3 , Episode 8 </Li> </Ul> </Td> </Tr> <Tr> <Th> Directed by </Th> <Td> <Ul> <Li> Larry Teng ( Supergirl ) </Li> <Li> James Bamford ( Arrow ) </Li> <Li> Dermott Downs ( Flash ) </Li> <Li> Gregory Smith ( LoT ) </Li> </Ul> </Td> </Tr> <Tr> <Th> Story by </Th> <Td> <Ul> <Li> Andrew Kreisberg </Li> <Li> Marc Guggenheim </Li> </Ul> </Td> </Tr> <Tr> <Th> Teleplay by </Th> <Td> <Ul> <Li> Robert Rovner ( Supergirl ) </Li> <Li> Jessica Queller ( Supergirl ) </Li> <Li> Wendy Mericle ( Arrow ) </Li> <Li> Ben Sokolowski ( Arrow ) </Li> <Li> Todd Helbing ( Flash ) </Li> <Li> Phil Klemmer ( LoT ) </Li> <Li> Keto Shimizu ( LoT ) </Li> </Ul> </Td> </Tr> <Tr> <Th> Original air dates </Th> <Td> <Ul> <Li> November 27 , 2017 ( 2017 - 11 - 27 ) ( 1 & 2 ) </Li> <Li> November 28 , 2017 ( 2017 - 11 - 28 ) ( 3 & 4 ) </Li> </Ul> </Td> </Tr> <Tr> <Th colspan="2"> Episode chronology </Th> </Tr> <Tr> <Td colspan="2"> <Table> <Tr> <Td colspan="2"> Supergirl </Td> </Tr> <Tr> <Td> ← Previous `` Wake Up '' </Td> <Td> Next → `` Reign '' </Td> </Tr> <Tr> <Td colspan="2"> List of Supergirl episodes </Td> </Tr> <Tr> <Td colspan="2"> </Td> </Tr> <Tr> <Td colspan="2"> Arrow </Td> </Tr> <Tr> <Td> ← Previous `` Thanksgiving '' </Td> <Td> Next → `` Irreconcilable Differences '' </Td> </Tr> <Tr> <Td colspan="2"> List of Arrow episodes </Td> </Tr> <Tr> <Td colspan="2"> </Td> </Tr> <Tr> <Td colspan="2"> The Flash </Td> </Tr> <Tr> <Td> ← Previous `` Therefore I Am '' </Td> <Td> Next → `` Do n't Run '' </Td> </Tr> <Tr> <Td colspan="2"> List of The Flash episodes </Td> </Tr> <Tr> <Td colspan="2"> </Td> </Tr> <Tr> <Td colspan="2"> Legends of Tomorrow </Td> </Tr> <Tr> <Td> ← Previous `` Welcome to the Jungle '' </Td> <Td> Next → `` Beebo the God of War '' </Td> </Tr> <Tr> <Td colspan="2"> List of Legends of Tomorrow episodes </Td> </Tr> <Tr> <Td colspan="2"> </Td> </Tr> </Table> </Td> </Tr> <Tr> <Th> Preceded by </Th> <Td> `` Invasion ! '' </Td> </Tr> </Table>
<Table> <Tr> <Th colspan="2"> `` Crisis on Earth - X '' </Th> </Tr> <Tr> <Td colspan="2"> Arrowverse crossover event </Td> </Tr> <Tr> <Td colspan="2"> Promotional poster </Td> </Tr> <Tr> <Th> Episode nos . </Th> <Td> <Ul> <Li> Supergirl ( part 1 ) </Li> <Li> Season 3 , Episode 8 </Li> <Li> Arrow ( part 2 ) </Li> <Li> Season 6 , Episode 8 </Li> <Li> The Flash ( part 3 ) </Li> <Li> Season 4 , Episode 8 </Li> <Li> Legends of Tomorrow ( part 4 ) </Li> <Li> Season 3 , Episode 8 </Li> </Ul> </Td> </Tr> <Tr> <Th> Directed by </Th> <Td> <Ul> <Li> Larry Teng ( Supergirl ) </Li> <Li> James Bamford ( Arrow ) </Li> <Li> Dermott Downs ( Flash ) </Li> <Li> Gregory Smith ( LoT ) </Li> </Ul> </Td> </Tr> <Tr> <Th> Story by </Th> <Td> <Ul> <Li> Andrew Kreisberg </Li> <Li> Marc Guggenheim </Li> </Ul> </Td> </Tr> <Tr> <Th> Teleplay by </Th> <Td> <Ul> <Li> Robert Rovner ( Supergirl ) </Li> <Li> Jessica Queller ( Supergirl ) </Li> <Li> Wendy Mericle ( Arrow ) </Li> <Li> Ben Sokolowski ( Arrow ) </Li> <Li> Todd Helbing ( Flash ) </Li> <Li> Phil Klemmer ( LoT ) </Li> <Li> Keto Shimizu ( LoT ) </Li> </Ul> </Td> </Tr> <Tr> <Th> Original air dates </Th> <Td> <Ul> <Li> November 27 , 2017 ( 2017 - 11 - 27 ) ( 1 & 2 ) </Li> <Li> November 28 , 2017 ( 2017 - 11 - 28 ) ( 3 & 4 ) </Li> </Ul> </Td> </Tr> <Tr> <Th colspan="2"> Episode chronology </Th> </Tr> <Tr> <Td colspan="2"> <Table> <Tr> <Td colspan="2"> Supergirl </Td> </Tr> <Tr> <Td> ← Previous `` Wake Up '' </Td> <Td> Next → `` Reign '' </Td> </Tr> <Tr> <Td colspan="2"> List of Supergirl episodes </Td> </Tr> <Tr> <Td colspan="2"> </Td> </Tr> <Tr> <Td colspan="2"> Arrow </Td> </Tr> <Tr> <Td> ← Previous `` Thanksgiving '' </Td> <Td> Next → `` Irreconcilable Differences '' </Td> </Tr> <Tr> <Td colspan="2"> List of Arrow episodes </Td> </Tr> <Tr> <Td colspan="2"> </Td> </Tr> <Tr> <Td colspan="2"> The Flash </Td> </Tr> <Tr> <Td> ← Previous `` Therefore I Am '' </Td> <Td> Next → `` Do n't Run '' </Td> </Tr> <Tr> <Td colspan="2"> List of The Flash episodes </Td> </Tr> <Tr> <Td colspan="2"> </Td> </Tr> <Tr> <Td colspan="2"> Legends of Tomorrow </Td> </Tr> <Tr> <Td> ← Previous `` Welcome to the Jungle '' </Td> <Td> Next → `` Beebo the God of War '' </Td> </Tr> <Tr> <Td colspan="2"> List of Legends of Tomorrow episodes </Td> </Tr> <Tr> <Td colspan="2"> </Td> </Tr> </Table> </Td> </Tr> <Tr> <Th> Preceded by </Th> <Td> `` Invasion ! '' </Td> </Tr> </Table>
what season of supergirl is crisis on earth x
what season of supergirl is crisis on earth x
Season 3
Season 3