<Tr> <Td> 6 . </Td> <Td> "Runnin' Home to You" </Td> <Td> <Ul> <Li> Benj Pasek </Li> <Li> Justin Paul </Li> </Ul> </Td> <Td> Grant Gustin </Td> <Td> 2: 46 </Td> </Tr> <Ul> <Li> Benj Pasek </Li> <Li> Justin Paul </Li> </Ul> <Tr> <Td> 7 . </Td> <Td> "Runnin' Home to You" (guitar version) </Td> <Td> <Ul> <Li> Pasek </Li> <Li> Paul </Li> </Ul> </Td> <Td> Grant Gustin </Td> <Td> 2: 45 </Td> </Tr> <Ul> <Li> Pasek </Li> <Li> Paul </Li> </Ul>

What episode of supergirl is the flash crossover