<Tr> <Td_colspan="7"> George learns about the procedure that Webber and Bailey performed on his father which ultimately leads to a worsening of his condition . The O'Malley family now have to face a difficult decision regarding Harold's inability to breathe on his own . They must take him off life support . Meredith finally talks to her father and realizes that her snoring is one of the many things they have in common, despite her inability to admit it . Meredith and Derek continue to argue over her snoring, but the situation is resolved following Meredith's talk with her dad . There's tension between Alex and Addison that eventually leads to them kissing . Addison confesses to Callie that she got pregnant with Mark's son but aborted him after realizing that Mark could never be a good father . Burke lets Cristina know about the status of his condition, but the pair still refuse to talk to each other . Izzie is barred from the girl's surgery after Bailey finds out that she paid for the operation, but she ultimately wins her respect after realizing that without the money the girl could have never been saved . The girl begins a new life as a normal child thanks to Izzie's generous donation . </Td> </Tr> <Tr> <Th> 49 </Th> <Td> 13 </Td> <Td> "Great Expectations" </Td> <Td> Michael Grossman </Td> <Td> Eric Buchman </Td> <Td> January 25, 2007 (2007 - 01 - 25) </Td> <Td> 21.50 </Td> </Tr> <Tr> <Td_colspan="7"> After Webber announces his retirement, rumors begin to circulate on his departure and successor . Mark is determined to leave Seattle for good, and irritates Meredith and Alex by making them tend to a patient who will need constant attention but Meredith accidentally gives Mark incentive to stay after letting him know of the open Chief position . Derek is angry at Meredith for causing Mark to remain in Seattle, but soon realizes that she is not the reason he is really angry . The attending physicians at Seattle Grace Hospital fight to get Webber's attention, but he expresses his disappointment in their conduct . He also forces Bailey to get signatures from all the attendings so she can create a free medical clinic, before confessing to her that he thinks she will be Chief one day . Bailey secures the signatures, but has no funding until Izzie offers to spend her entire 8.7 million dollar inheritance on the project . Addison, Izzie, and George treat a patient with a cervical tumor, and Izzie gets worried about George due to his dad having recently died from cancer . Things get more complicated when the patient's Puritan parents arrive . Addison is avoiding Alex following their kiss . Callie and Cristina treat a marathon runner who collapsed after a blackout . George, devastated after his father's death, reunites with Callie and uses sex to overcome his grief, before eventually proposing to her . Cristina and Burke still don't speak to each other, but she eventually breaks, and Burke ends up proposing to her . Webber endeavors to reunite with his wife, Adele, and decides to retire, only to come home and find she's with another man . </Td> </Tr> <Tr> <Th> 50 </Th> <Td> 14 </Td> <Td> "Wishin' and Hopin"' </Td> <Td> Julie Anne Robinson </Td> <Td> Tony Phelan & Joan Rater </Td> <Td> February 1, 2007 (2007 - 02 - 01) </Td> <Td> 24.18 </Td> </Tr>

Grey's anatomy new chief of surgery season 3