added by lexabuti
After Derek walks in on Addison and Mark he ends his relationship with Addison. Addison struggles to keep their marriage together, but Derek is adamant and walks out on her. Addison then moves on.
added by JamesLafferty
Episode is Straight to the heart. It's just a recap over seasons 2 and 3-I think! Lol! and it's just about how it all started! Enjoy!!!