Why did Abby and Luka leave ER?
William Howard
Published Apr 16, 2026
Abby's final appearance as a series regular was in the Season 15 episode "The Book of Abby", when she quietly left with Luka and her son Joe to live in Boston, after the couple decided it was time for a clean start.
Why did Luka leave ER?
While Abby seeks help for her alcoholism, Luka and Joe return to Croatia for his father's funeral. While Abby is in rehab, Luka briefly returns to Chicago to visit her, at which time he quit his job at County.Why did Kovac and Abby break up?
She and Luka stay together for about a year, but their relationship becomes more strained after the arrival of Abby's mother and the increasing closeness between Abby and Dr. John Carter, and a heated argument leads to their break up at the beginning of the eighth season.When did Luka Kovac leave ER?
Portrayed byAs attending physician of the ER, Luka mentored numerous medical students and residents through their medical careers. In Season 14, he exits the ER and temporarily works as a hospice physician until he and Abby Lockhart, fellow doctor and wife, decide to leave Chicago together for Boston.