<Tr> <Th> Production code </Th> <Td> 2J7515 </Td> </Tr> <Tr> <Th> Original air date </Th> <Td> March 6, 2014 </Td> </Tr> <Tr> <Th_colspan="2"> Guest appearance (s) </Th> </Tr> <Tr> <Td_colspan="2"> <Ul> <Li> Olga Fonda (Nadia) </Li> <Li> Rick Cosnett (Wes Maxfield) </Li> <Li> Penelope Mitchell (Liv Parker) </Li> </Ul> </Td> </Tr>

What did katherine do to elena in season 5 episode 15