<Tr> <Th> Written by </Th> <Td> Brian Young </Td> </Tr> <Tr> <Th> Production code </Th> <Td> 2J7514 </Td> </Tr> <Tr> <Th> Original air date </Th> <Td> February 27, 2014 </Td> </Tr> <Tr> <Th_colspan="2"> Guest appearance (s) </Th> </Tr>

When does everyone find out katherine took over elena's body