<Table> <Tr> <Th_colspan="2"> "Song Beneath the Song" </Th> </Tr> <Tr> <Td_colspan="2"> Grey's Anatomy episode </Td> </Tr> <Tr> <Th> Episode no . </Th> <Td> Season 7 Episode 18 </Td> </Tr> <Tr> <Th> Directed by </Th> <Td> Tony Phelan </Td> </Tr> <Tr> <Th> Written by </Th> <Td> Shonda Rhimes </Td> </Tr> <Tr> <Th> Featured music </Th> <Td> "Cosy in the Rocket" "Chasing Cars" "Breathe (2 AM)" "How We Operate" "Wait" "Running on Sunshine" "Universe & U" "Grace" "How to Save a Life" "The Story" </Td> </Tr> <Tr> <Th> Original air date </Th> <Td> March 31, 2011 (2011 - 03 - 31) </Td> </Tr> <Tr> <Th> Running time </Th> <Td> 43 minutes </Td> </Tr> <Tr> <Th_colspan="2"> Guest appearance (s) </Th> </Tr> <Tr> <Td_colspan="2"> <Ul> <Li> Kate Walsh as Addison Montgomery </Li> <Li> Rachael Taylor as Dr. Lucy Fields </Li> <Li> Daniel Sunjata as Eli </Li> <Li> Scott Foley as Henry Burton </Li> </Ul> </Td> </Tr> <Tr> <Th_colspan="2"> Episode chronology </Th> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> ← Previous "This is How We Do It" </Td> <Td> Next → "It's a Long Way Back" </Td> </Tr> </Table> </Td> </Tr> <Tr> <Td_colspan="2"> List of Grey's Anatomy episodes </Td> </Tr> </Table> <Tr> <Th_colspan="2"> "Song Beneath the Song" </Th> </Tr>

When do they play chasing cars in grey's anatomy
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