<Tr> <Th> Full name </Th> <Td> Alexandra Caroline Grey </Td> </Tr> <Tr> <Th> Nickname (s) </Th> <Td> Little Grey, Lexipedia, Three </Td> </Tr> <Tr> <Th> Occupation </Th> <Td> Surgical resident at Seattle Grace Mercy West Hospital Surgical intern at Seattle Grace Hospital (formerly) </Td> </Tr> <Tr> <Th> Title </Th> <Td> M.D. </Td> </Tr>

In what episode of grey's anatomy do lexie and mark get together