With a Latourian Actor-Network Theory approach, Urban Design on the Move follows a young design team’s transformative journey of implementing the Europan 4 winning project at Heraklion’s old city waterfront in Crete, Greece. During the design trajectory, the team mediates several controversies that become decisive for the project’s outcome. Together with Hercules, a fictional character and friend of the team, they accompany the transformation of the competition’s design strategies into implemented urban practices. In a unique storytelling format, the author unpacks the team’s design diplomacy skills in promoting their idea of an open and porous city welcoming heterogeneous publics—laying bare the informal and unsaid aspects of the design implementation process. With forewords by Didier Rebois and Albena Yaneva a compelling analysis of urban design in the making written in a unique storytelling format an inspiration for urban designers in uncertain environments