This document outlines an agenda for a workshop on designing user experiences (UX) across digital and physical spaces, or "UX in 4D". The workshop aims to understand why digital and physical experiences should be integrated, learn tools for UX design across dimensions, and review examples of innovative organizations that blend physical and digital experiences. The agenda includes introductions, discussions of experience drivers, opportunities mapping exercises, developing future personas and journey maps, and a Q&A. The document also provides background on the facilitators and their experience consulting with various organizations on experience design.