What is the running time of The Man Behind The Mask? The running time of The Man Behind The Mask is 2 hours 30 minutes, including a 20 minute interval. Related articles Will there be signings after performances? What is the running time of To Kill A Mockingbird? Can I exchange my tickets to another production? When will I get my e-tickets? Who will be in the cast of To Kill a Mockingbird at my performance?