<Tr> <Th_colspan="2"> Dr. Izzie Stevens </Th> </Tr> <Tr> <Td_colspan="2"> Grey's Anatomy character </Td> </Tr> <Tr> <Td_colspan="2"> The Season 6 Promotional Photo of Katherine Heigl as Dr. Izzie Stevens </Td> </Tr> <Tr> <Th> First appearance </Th> <Td> "A Hard Day's Night" 1x01, March 27, 2005 </Td> </Tr>

When does izzy return to grey's anatomy