Overall narrative architecture across all 15 seasons
Story Structure — 5 Plot Phases
Seasons 1-3: Foundations & Fractures
Seasons 4-6: New Alliances & Ethical Trials
Seasons 7-9: Crisis & Transformation
Seasons 10-12: Leadership Shifts & Personal Growth
Seasons 13-15: Legacy & Conclusion
ER explores the inner workings of an urban teaching hospital and the critical issues faced by the dedicated physicians and staff of its overburdened emergency room.