This book focuses on experimental theatre company, GAle GAtes, credited as "the true innovator" of the contemporary immersive movement. The Immersive Theatre of GAle GAtes is a case-study of this little-known but visionary company, with a focus on its development and dramaturgy. Through rare archival and primary research, as well as historical context, the text chronicles company narrative and celebrates the artistic impulse. The book employs descriptive-narrative and dramaturgical analysis and is composed of historical research, rare archives, and primary source interviews. Chapters focus on the trajectory of the avant-garde leading up to the climate in which the company formed, company formative years, and major works and a discussion on the interdisciplinary and theoretical frameworks critical to its understanding. This study will be of great interest to students and scholars in theatre and performance studies and essential reading for theatre artist and historian alike, with a focus on the experimental theatre landscape.