Zero Day (TV) Cast
The cast of Zero Day. Updated on September 6, 2025.
13 actors
Robert De Niro
as George Mullen (6 episodes)

Robert De Niro plays George Mullen, a central figure in the political conspiracy.

Angela Bassett
as President Evelyn Mitchell (6 episodes)

Angela Bassett portrays President Evelyn Mitchell, who faces the challenges of a global cyberattack.

Jesse Plemons
as Roger Carlson (6 episodes)

Jesse Plemons takes on the role of Roger Carlson, whose involvement is critical to the unfolding conspiracy.

Lizzy Caplan
as Alexandra Mullen (6 episodes)

Lizzy Caplan plays Alexandra Mullen, a key character within the Mullen family.

Connie Britton
as Valerie Whitesell (6 episodes)

Connie Britton is Valerie Whitesell, whose connections impact the narrative.

Joan Allen
as Sheila Mullen (6 episodes)

Joan Allen portrays Sheila Mullen, an integral part of the Mullen family's story.

Matthew Modine
as Richard Dreyer (6 episodes)

Matthew Modine takes on the character of Richard Dreyer, who is involved in the political turmoil.

Bill Camp
as CIA Director Jeremy Lasch (6 episodes)

Bill Camp plays CIA Director Jeremy Lasch, overseeing critical intelligence operations.

Dan Stevens
as Evan Green (6 episodes)

Dan Stevens plays Evan Green, whose role intertwines with the main plot.

McKinley Belcher III
as Carl Otieno (6 episodes)

McKinley Belcher III portrays Carl Otieno, contributing to the intrigue of the series.

Gaby Hoffmann
as Monica Kidder (6 episodes)

Gaby Hoffmann is Monica Kidder, playing a role in the cyberthreat landscape.

Clark Gregg
as Robert Lyndon (6 episodes)

Clark Gregg takes on the role of Robert Lyndon, connected to the unfolding events.

Mark Ivanir
as Natan (6 episodes)
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