Eric marks dating
Mark first appears in season two, introduced as a highly respected otolaryngologist sub-specialized in plastic surgery and the childhood best friend of neurosurgeon Derek Shepherd (Patrick Dempsey). Mark's focal storyline in the series involved his romantic relationship with Lexie Grey (Chyler Leigh), one of the interns who was on his service when they started dating.Mark and Lexie's relationship becomes increasingly serious.He meets her father, Thatcher (Jeff Perry); and at the end of season five, asks her to move in with him.Derek explains that Mark had an affair with his wife, Addison (Kate Walsh) while they were living in New York.
He and Addison once again sleep together, but when he comes back he tells Lexie because he doesn't want to lie to her and wants them to get back together, but when she tells him she slept with Alex it puts an end to their relationship.
Mark eventually agrees and tells Derek, who attacks him.
Animosity exists between them for several episodes, before they once more repair their friendship.
Mark returns during season three at Addison's drunken behest, but she again rejects him once sober.
Undeterred, Mark sells his successful private practice (which he previously shared with Derek) and takes over the plastics program at Seattle Grace Hospital.