<Tr> <Th> Episode no . </Th> <Td> Season 2 Episode 21 </Td> </Tr> <Tr> <Th> Directed by </Th> <Td> Paul M. Sommers </Td> </Tr> <Tr> <Th> Written by </Th> <Td> Caroline Dries Mike Daniels </Td> </Tr> <Tr> <Th> Production code </Th> <Td> 2J5271 </Td> </Tr>

When does jenna come back in vampire diaries