what season does meredith and derek get married in grey's anatomy
Derek Shepherd In seasons three and four, Meredith and Derek's relationship becomes rocky and they each take time to date other people. Derek's plans to propose were ruined by a series of unfortunate events in season five. In the season finale, they decide to give their planned wedding to Alex and Izzie. Due to their tight schedule, they instead informally marry and Derek writes down their "promises" on a post-it note. They legalize their marriage in season seven in order to adopt Zola, a young African orphan treated for spina bifida.[16] They briefly separate after Meredith tampers with their Alzheimer's trial, jeopardizing her career and tarnishing Derek's reputation. Zola is taken away from Meredith after a social worker finds out she and Derek are living separately. In later seasons, Derek often griped about how his subsequent interns and residents – mainly Lexie Grey, Shane Ross and Heather Brooks – did not quite measure up to Meredith.[4][10] The social worker comes back and announces they are the official parents of Zola. As Meredith nears the end of her fifth year of residency, she and Derek are torn between staying at Seattle Grace Mercy West or leaving for Boston where Derek would work at Harvard while Meredith would be at the Brigham and Women's Hospital.
Addison Montgomery The character Addison first appears in the season one finale of Grey's Anatomy, arriving at Richard's behest. She tries to reconcile with Derek, despite his relationship with Meredith Grey, but he is still angry with her, and there is a period of antagonism between them. Addison's presence, however, does reinvigorate their relationship, and ultimately leads to Derek choosing Addison over Meredith, despite Derek eventually admitting that he fell in love with Meredith.[13] They attempt to return to their former life, taking residence in his trailer, and Addison becomes the head of a unique surgical service integrating neonatal surgery and obstetrics and gynecology.[14] She realizes that Derek still has feelings for Meredith, and their marriage is tested further when Mark arrives in Seattle looking for Addison. Mark makes Addison realize that Derek is in love with Meredith and that he (Mark) does love her.[15] Derek sleeps with Addison after he sees that Meredith has moved on. When Addison finds out that Derek had sex with Meredith, she gets drunk and sleeps with Mark. He asks for a relationship, but she rejects him.[16]