<P> In the series' first episode, Addison is made to feel unwelcome by the other doctors but stays . Addison is attracted to Pete Wilder, the practice's alternative medicine specialist . When Pete stands her up on a date, Addison decides they should be friends and nothing more, and instead accepts a date with Kevin, a police officer she met through work . In a crossover episode, Addison briefly returns to Seattle Grace to help with a patient . Before she leaves, Addison advises Meredith not to let Derek get away . </P> <P> In season two, Addison learns from Naomi that the practice is failing financially . She tells Sam against Naomi's wishes, and, feeling betrayed, Naomi breaks off her friendship with Addison . Addison inadvertently prompts the staff to vote between Sam and Naomi, and is surprised when instead, she is elected to lead the practice as its director . </P> <P> Addison's relationship with Kevin is tested when her brother Archer tells Kevin he is not good enough for her . Addison reassures him, but it causes them to break up later . Addison is surprised when Archer begins working for Pacific Wellcare Center, a rival practice . When he experiences multiple seizures and believes he has a brain tumor, Addison asks Derek to treat Archer in another crossover episode with Grey's Anatomy . Derek discovers he has parasites in his brain, and successfully removes them . Naomi and Archer begin dating, which puts some strain on the friendship between Addison and Naomi . Addison also dates a man who is later revealed to be married . Also during this time, it is revealed that Addison's mother Bizzy is a lesbian who has been in a long term affair with her best friend . Addison is angry because she always blamed her father for his many affairs and was angry at how he treated Bizzy, not realizing that her mother was the one in a serious extramarital relationship . Addison's father is aware of her mother's affair, but they decided a long time ago that they would stay married to one another because Bizzy is not comfortable with others knowing about her sexuality . Although the relationship with her parents is strained from this, in the end they make peace . </P> <P> Addison and Sam start developing feelings for each other . It is revealed that, back in college, Sam wanted to ask Addison out but was too nervous, and he ended up with Naomi . They share a kiss after a terrifying ordeal when they tried to save a married couple who got into a devastating car accident . They kiss again when Addison decides to sleep over at Sam's . Addison and Sam grow close, but she decides to put a halt on their developing relationship, worried about the consequences in her friendship with Naomi . Addison revealed that she was in love with Sam and Pete, but she decided to begin a relationship with Pete instead, while Sam was with another doctor . Despite them being with other people, they still show they harbor feelings for each other, including jealousy when they see the other with their current significant others . After Sam becomes single again, he kisses Addison again . Although she was with Pete, she kisses Sam back and Pete catches them . Despite this, they stay together . Naomi ends her friendship with Addison after she finds about Sam and Addison . In the season finale, Addison has to operate on Maya Bennett, her godchild, who got in a car accident on her way to the hospital to give birth . She and Naomi then make up . Addison breaks up with Pete, and she and Sam finally become a couple . Although Addison wants to have children, Sam tells her he's not ready to have more children, as he wants to take time in their romance . Sam and Addison end their relationship and Addison goes on a date with a man named Jake (played by Benjamin Bratt). He invites her to Fiji, and although she initially agrees, in the end she chooses to get back together with Sam . </P>

When do derek and addison finally break up