'Zero Day' Cast and Character Breakdown: Meet the Stars of Netflix’s Political Thriller

'Zero Day' Cast and Character Breakdown: Meet the Stars of Netflix’s Political Thriller

The limited series, premiering on February 20, marks Robert De Niro's TV debut as both executive producer and star.

McKinley Belcher III as Carl Otieno, Mozhan Navabi as Melissa Kornblau, Robert De Niro as George Mullen, Jesse Plemons as Roger Carlson, and Connie Britton as Valerie Whitesell in "Zero Day." (Credit: Netflix)

By Lucas Manfredi | February 20, 2025

Robert De Niro takes the lead in Zero Day, a Netflix political thriller where he plays a former U.S. president tasked with heading a commission to uncover those responsible for a devastating cyberattack that has claimed thousands of lives. The series follows his character’s unraveling discovery of widespread deception and conspiracies.

This limited series, which debuts February 20, was created by Eric Newman ("Griselda") and Noah Oppenheim ("Jackie"), with Lesli Linka Glatter ("Homeland," "Mad Men," "Love & Death") serving as executive producer and director of all six episodes. De Niro, Michael S. Schmidt, and Jonathan Glickman also executive produce the show.

Here’s a rundown of the main Zero Day cast members and other notable roles you may recognize them from:

George Mullen (Robert De Niro)
De Niro portrays George Mullen, a popular yet complex former president who is pulled from retirement to lead the Zero Day Commission investigating a global cyberattack. De Niro’s legendary career includes iconic roles in Raging Bull, Taxi Driver, The Godfather Part II, Goodfellas, Killers of the Flower Moon, and more.

Evelyn Mitchell (Angela Bassett)
Bassett plays Evelyn Mitchell, the current U.S. president, a sharp political strategist who recruits Mullen for the commission. Bassett is known for Black Panther, How Stella Got Her Groove Back, Waiting to Exhale, 9-1-1, and American Horror Story.

Roger Carlson (Jesse Plemons)
Jesse Plemons stars as Roger Carlson, Mullen’s former aide and a skilled fixer hoping to regain political influence. Plemons’ credits include The Power of the Dog, Breaking Bad, The Irishman, Fargo, and Love & Death.

Alexandra Mullen (Lizzy Caplan)
Lizzy Caplan portrays Alexandra Mullen, a young congresswoman trying to carve out her own legacy despite her father's political history. Caplan’s previous work includes Mean Girls, Fleishman Is in Trouble, Masters of Sex, and Party Down.

Valerie Whitesell (Connie Britton)
Britton plays Valerie Whitesell, a savvy political strategist and Mullen’s former chief of staff who returns to public life to support his commission role. Britton is recognized from The White Lotus, Nashville, Friday Night Lights, American Horror Story, and 9-1-1.

Sheila Mullen (Joan Allen)
Joan Allen stars as Sheila Mullen, a former first lady with her own professional ambitions, balancing her family and career. Allen’s filmography includes Room, The Notebook, Death Race, and The Crucible.

Richard Dreyer (Matthew Modine)
Matthew Modine plays Richard Dreyer, a seasoned public figure and politician who serves as Speaker of the House. Modine is known for Full Metal Jacket, Stranger Things, Oppenheimer, Weeds, and Birdy.

Evan Green (Dan Stevens)
Dan Stevens portrays Evan Green, a charismatic yet divisive TV host whose outspoken criticism of Mullen makes him a major antagonist. Stevens is recognized from Downton Abbey, Beauty and the Beast, Legion, The Guest, and Solar Opposites.

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