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.

#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.

#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.

#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.

#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.

#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.

#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.