Zero Day is a Netflix political thriller starring Robert De Niro as a former U.S. president called back into service to lead an investigation into a catastrophic terror attack on American soil. When a coordinated assault on the country's rail infrastructure kills hundreds and triggers national panic, the government turns to George Mullen — a respected elder statesman whose reputation for integrity and independence makes him the one person all sides trust to find the truth. What Mullen discovers as he digs deeper threatens not just powerful individuals but the foundations of American democracy itself.

Created by Eric Newman and Lesli Linka Glatter, Zero Day operates at the intersection of procedural thriller and political allegory, using its investigation framework to examine how truth becomes weaponized in a polarized information environment. The supporting cast is remarkable — Jesse Plemons, Lizzy Caplan, Angela Bassett, and Joan Allen all bring their considerable talents to roles that resist easy categorization as heroes or villains. The show's pacing is deliberately methodical, building pressure across its six episodes until the finale's revelations reframe everything that came before.

Zero Day arrived on Netflix in early 2025 as one of the streamer's most ambitious original productions, and it quickly became a cultural flashpoint for its frank engagement with themes of disinformation, political violence, and institutional decay. Critics praised De Niro's commanding central performance and the show's refusal to offer comforting resolution — a boldness that made it essential viewing even when its conclusions were deeply unsettling.