<Tr> <Th> 168 </Th> <Td> 20 </Td> <Td> "The Girl With No Name" </Td> <Td> Ron Underwood </Td> <Td> Peter Nowalk </Td> <Td> April 19, 2012 (2012 - 04 - 19) </Td> <Td> 9.82 </Td> </Tr> <Tr> <Td_colspan="7"> The doctors work on a Jane Doe, who turns out to be the subject of a case that gained national interest . Cristina proves to be in highest demand as the residents begin their interviews for post-residency positions at prospective hospitals while the attendings find ways to keep their best residents in Seattle . Richard is faced with an unsettling realization when he visits Adele at Rose Ridge . </Td> </Tr> <Tr> <Th> 169 </Th> <Td> 21 </Td> <Td> "Moment of Truth" </Td> <Td> Chandra Wilson </Td> <Td> Zakiyyah Alexander </Td> <Td> April 26, 2012 (2012 - 04 - 26) </Td> <Td> 9.45 </Td> </Tr> <Tr> <Td_colspan="7"> The residents travel to San Francisco for the oral boards . Sparks fly when Richard and Catherine (Debbie Allen) bump into each other at a hotel . Alex feels guilty about being away from the hospital as Tommy's health takes a turn for the worse . April loses her virginity to Jackson . </Td> </Tr>

When does meredith and derek get back together in season 8