Robert De NiroPresident George Mullen
Jesse PlemonsRoger Carlson
Lizzy CaplanAlexandra Mullen
Connie BrittonValerie Whitesell
Joan AllenSheila Mullen
Bill CampCIA Director Jeremy Lasch
Series2025TV-MA
Zero Day
A former U.S. President is called out of retirement to find the source of a deadly cyberattack, only to discover a vast web of lies and conspiracies.
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Every episode is one beat. Taller beats rated better.
S1 · 6.7
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Episode 1
Former President George Mullen's comfortable retirement is upended after he's asked to lead an investigation into a horrific cyberattack.
Episode 2
Mullen's commission investigates a hacking ring. President Mitchell weighs retaliation. A powerful figure has demands for Roger.
Episode 3
Mullen's initial arrests draw blowback from the public — especially TV pundit Evan Green. Alex faces pressure to investigate her father.
Episode 4
A shock to the financial system increases scrutiny on Mullen's commission. Valerie investigates Proteus. Roger must make a difficult choice.
Episode 5
A personal tragedy reopens old wounds for the Mullen family. Speaker Dreyer pushes for a change in leadership. Sheila testifies before Congress.
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