Complex sentence: She is divorced from Jack Boyle, a criminal defense attorney, and in the season three episode "Old Wounds", she finally changes her name back from Erin Reagan-Boyle to just Erin Reagan.
Split into simpler sentences: She is divorced from Jack Boyle, a criminal defense attorney. In the season three episode "Old Wounds," she finally changes her name from Erin Reagan-Boyle back to Erin Reagan.