Longtime 'Chicago Med' Star Exits Show, Character Reunites with Former Love in Series Finale

Dr. Will Halstead, played by Nick Gehlfuss, leaves Gaffney Chicago Medical Center in the Season 8 finale after eight years on the show.
Halstead decides to move to Seattle to restart his relationship with Dr. Natalie Manning, played by Torrey DeVitto, who returns for the finale.
Gehlfuss felt he had taken the character of Dr. Halstead as far as he could and was ready to explore new opportunities, though he's open to returning to the One Chicago universe.
The hospital's financial troubles and a desire for new challenges led Halstead to resign despite being an original cast member.
Gehlfuss and showrunners felt Halstead's departure and reunion with Manning brought his character arc full circle.