In the pursuit of creating interactive experiences which are both engaging and robust, there is great potential for semi-autonomous agents to leverage the intelligence and creativity of a human operator.  The international workshop on Collaborative Human/AI Control for Interactive Experiences (CHACIE) aims to foster a dialog among researchers who are exploring the complex tradeoffs that must be made in designing collaborative human/AI agent systems for  interactive experiences. As a half day workshop at AAMAS 2010, CHACIE will explore this task, by identifying and discussing the challenges that may arise during its completion, encouraging collaboration across the fields that will inform a solution, and investigating new domains in which solutions might be applied.  While existing semi-autonomous solutions for such experiences are either too costly, inflexible, abrupt, or inconsistent, we believe that by seamlessly balancing the control of each experience between AI agents and a human operator, both operator efficiency and user satisfaction can be substantially improved.