This chapter explores how collective mental time travel (MTT)—the shared ability to mentally reconstruct the past and imagine future scenarios at the group level—was shaped during the COVID-19 pandemic. Drawing on psychological theories of memory and identity, the chapter delineates how shared representations of collective past and future emerged during this global crisis. Through data from a large international study involving over 4000 participants across 15 countries, the chapter demonstrates the convergence and stability of pandemic-related themes—such as lockdowns, infections, and economic consequences—across temporal (past, future) and spatial (national, global) dimensions. Notably, pandemic-related collective future thoughts exhibited greater positivity compared to past events, especially at the national level. Individual differences, such as affective traits and personality factors, modulated the emotional tone and frequency of spontaneous collective memories and future thoughts. Moreover, the chapter highlights the role of media narratives and political discourse in shaping the accessibility and emotional resonance of collective event representations. Counterfactual thinking and spatial optimism further influenced how groups imagined alternative pandemic trajectories and perceived threat severity. Importantly, collective identity—whether political, religious, or national—played a central role in shaping the content, phenomenology, and emotional evaluation of collective representations. This body of evidence not only enriches our understanding of collective memory and prospection under crisis but also raises critical questions about the long-term impact of identity-based divergences, media framing, and social narratives on collective event construction. Future research should investigate how concurrent events and social movements (e.g., the Black Lives Matter protests) interact with collective representations and how memory for such global crises evolves over time. Understanding collective MTT is essential for improving public communication strategies and fostering social cohesion during future global challenges.