<Tr> <Td_colspan="2"> Grey's Anatomy (season 5) List of Grey's Anatomy episodes </Td> </Tr> <P> "Elevator Love Letter" is the nineteenth episode of the fifth season of the American television medical drama, Grey's Anatomy and the show's 97th episode overall . Written by Stacy McKee and directed by Edward Ornelas, the episode was originally broadcast on the American Broadcasting Company (ABC) in the United States on March 26, 2009 . It was viewed by 15.81 million people and garnered a 5.5 / 13 Nielsen rating / share in the 18--49 demographic. Grey's Anatomy centers around a group of young doctors in training . </P> <P> In this episode, Derek Shepherd (Patrick Dempsey) proposes to the show's title character Meredith Grey (Ellen Pompeo) while Izzie Stevens (Katherine Heigl) undergoes surgery for cancer with Alex Karev (Justin Chambers) feeling guilty for her condition . Cristina Yang (Sandra Oh) deals with the PTSD of her boyfriend and fellow surgeon Owen Hunt (Kevin McKidd). The episode received favorable reviews with critics calling it a payoff for Meredith and Derek fans . </P> <P> Cristina and Owen are finally spending nights with each other, relaxing by watching videos of surgeries . Cristina falls asleep, so Owen turns the TV off and shuts off the lights . He dozes off, and the peppy, happy music stops, replaced by whooshing sounds of the overhead ceiling fan turning in slow motion . The screen goes dark and the next thing we know, Owen is choking Cristina . She struggles but can't free herself . Callie walks through the door to see if everything OK, and stops him . </P>

When does derek propose to meredith in grey's anatomy
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