In the gripping political thriller series "Zero Day" (2025), Robert De Niro makes his television debut as George Mullen, a former U.S. President drawn back into the political arena following a catastrophic cyberattack that cripples the nation's infrastructure. As panic escalates and society teeters on the brink, Mullen is tasked with leading the investigation to uncover the perpetrators behind the assault. Navigating a labyrinth of conspiracy theories, political machinations, and a media landscape rife with misinformation, he must discern truth from deception to restore order. The series delves into themes of trust, the fragility of modern systems, and the pervasive influence of technology on daily life. Mullen's journey is further complicated by his strained relationship with his daughter, Alex (Lizzy Caplan), a liberal journalist whose ideals often clash with his own. As they confront their personal differences amidst national turmoil, the narrative explores the complexities of familial bonds under pressure. "Zero Day" boasts a stellar ensemble cast, including Jesse Plemons, Connie Britton, Joan Allen, and Angela Bassett, each portraying key figures in the unfolding crisis. The series masterfully balances intense drama with sharp political commentary, offering viewers a thought-provoking reflection on leadership, media influence, and the resilience required to navigate unprecedented challenges. With its timely subject matter and compelling performances, "Zero Day" stands out as a must-watch series that resonates with contemporary societal concerns, prompting audiences to question the stability of the systems they rely upon and the nature of truth in an increasingly digital world.