Complex sentence: The character was written out of the show in 1992 but brought back in 2002 for a new storyline involving her son (now old enough to be a doctor), Mark Maclaine, who wants to reconnect with his father, an idea Margo opposes.
Split into simpler sentences: The character was written out of the show in 1992 but brought back in 2002 for a new storyline involving her son, Mark Maclaine, who is now old enough to be a doctor. Dr. Maclaine wants to reconnect with his father, an idea Margo opposes.