The BEST episodes of Zero Day season 1

Every episode of Zero Day season 1, ranked from best to worst by thousands of votes from fans of the show. The best episodes of Zero Day season 1!

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.

Last Updated: 5/31/2025Network: NetflixStatus: Ended
Episode 5
star
7.61
817 votes

#1 - Episode 5

Season 1 - Episode 5 - Aired 2/20/2025

A personal tragedy reopens old wounds for the Mullen family. Speaker Dreyer pushes for a change in leadership. Sheila testifies before Congress.

Writer: Dee Johnson
Watch Now:AmazonApple TV
Episode 6
star
7.57
843 votes

#2 - Episode 6

Season 1 - Episode 6 - Aired 2/20/2025

A new threat creates further unrest across the nation. As he narrows in on the culprit, Mullen is faced with an agonizing decision.

Watch Now:AmazonApple TV
Episode 4
star
7.41
807 votes

#3 - Episode 4

Season 1 - Episode 4 - Aired 2/20/2025

A shock to the financial system increases scrutiny on Mullen's commission. Valerie investigates Proteus. Roger must make a difficult choice.

Writer: Eli Attie
Watch Now:AmazonApple TV
Episode 3
star
7.39
842 votes

#4 - Episode 3

Season 1 - Episode 3 - Aired 2/20/2025

Mullen’s initial arrests draw blowback from the public — especially TV pundit Evan Green. Alex faces pressure to investigate her father.

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Episode 2
star
7.34
912 votes

#5 - Episode 2

Season 1 - Episode 2 - Aired 2/20/2025

Mullen's commission investigates a hacking ring. President Mitchell weighs retaliation. A powerful figure has demands for Roger.

Watch Now:AmazonApple TV
Episode 1
star
7.31
1090 votes

#6 - Episode 1

Season 1 - Episode 1 - Aired 2/20/2025

Former President George Mullen’s comfortable retirement is upended after he’s asked to lead an investigation into a horrific cyberattack.

Watch Now:AmazonApple TV