<Tr> <Th> 31 </Th> <Td> 8 </Td> <Td> "Legends of Today" </Td> <Td> Ralph Hemecker </Td> <Td> Story by: Greg Berlanti & Andrew Kreisberg Teleplay by: Aaron Helbing & Todd Helbing </Td> <Td> December 1, 2015 (2015 - 12 - 01) </Td> <Td> 3J5658 </Td> <Td> 3.94 </Td> </Tr> <Tr> <Td_colspan="8"> <P> Vandal Savage arrives in Central City, seeking to kill Kendra . Barry goes to Star City and enlists the help of Oliver and his team to protect her . The team is visited by Malcolm who informs them that Savage is an immortal . Later, Kendra is kidnapped by Hawkman, but Barry and Oliver rescue her and capture Hawkman, who introducing himself as Carter Hall, tells them he and Kendra are soulmates who have been connected for millennia . The pair are destined to die, be reborn, and find each other in each lifetime . Carter also reveals that Savage has killed the pair several times, each time growing stronger . Savage acquires the Staff of Horus, a deadly weapon . Kendra unlocks her abilities and the team decides to regroup in Central City, where Oliver witnesses Samantha Clayton with her son, who is also his . Meanwhile, Caitlin and Harry create a serum that will temporarily increase Barry's speed so that he can defeat Zoom . Jay initially refuses to test the serum, but changes his mind to save Harry when the latter is shot by an unaware Patty, whom Joe later informs about the truth . However, Jay advises against using the serum on Barry . </P> This episode begins a crossover that concludes on Arrow season 4 episode 8 . The two episodes also set up Legends of Tomorrow . </Td> </Tr> <P> Vandal Savage arrives in Central City, seeking to kill Kendra . Barry goes to Star City and enlists the help of Oliver and his team to protect her . The team is visited by Malcolm who informs them that Savage is an immortal . Later, Kendra is kidnapped by Hawkman, but Barry and Oliver rescue her and capture Hawkman, who introducing himself as Carter Hall, tells them he and Kendra are soulmates who have been connected for millennia . The pair are destined to die, be reborn, and find each other in each lifetime . Carter also reveals that Savage has killed the pair several times, each time growing stronger . Savage acquires the Staff of Horus, a deadly weapon . Kendra unlocks her abilities and the team decides to regroup in Central City, where Oliver witnesses Samantha Clayton with her son, who is also his . Meanwhile, Caitlin and Harry create a serum that will temporarily increase Barry's speed so that he can defeat Zoom . Jay initially refuses to test the serum, but changes his mind to save Harry when the latter is shot by an unaware Patty, whom Joe later informs about the truth . However, Jay advises against using the serum on Barry . </P> <Tr> <Th> 32 </Th> <Td> 9 </Td> <Td> "Running to Stand Still" </Td> <Td> Kevin Tancharoen </Td> <Td> Andrew Kreisberg </Td> <Td> December 8, 2015 (2015 - 12 - 08) </Td> <Td> 3J5659 </Td> <Td> 3.55 </Td> </Tr>

How many episodes are in season 2 of the flash