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Silo S3E8 — Gray Goo

8.1

Silo•Season 3•Episode 8

Gray Goo

8.1/10 · 5,957 votesAug 20, 202656 min

Ranked #4 of 10 in Season 3•+0.1 vs season avg

Knox's father Gus comes clean about a secret. Charlotte makes a life-changing decision.

Directed byBert

Written byJenny DeArmitt-Stran

Previous episodeE7 · Radio Next episodeE9 · Farewell

Seasons4

Season 3 Episodes10

Who Are You? still

Who Are You?

It's All Good still

It's All Good

A Dark Web still

A Dark Web

Whatever You Do, Don't Go Home still

Whatever You Do, Don't Go Home

Memory still

Memory

The Drive still

The Drive

Radio still

Radio

Gray Goo still

E8 8.1Now viewing

Gray Goo

Farewell still

Farewell

Troy still

Troy

Cast15

Rebecca Ferguson

Rebecca Ferguson

Juliette Nichols

Common

Common

Robert Sims

Chinaza Uche

Chinaza Uche

Paul Billings

Ashley Zukerman

Ashley Zukerman

Daniel Keene

Shane McRae

Shane McRae

Knox

Remmie Milner

Remmie Milner

Shirley Campbell

Alexandria Riley

Alexandria Riley

Camille Sims

Reed Birney

Reed Birney

Henry

Laura Innes

Laura Innes

Senator Thurman

Jessica Brown Findlay

Jessica Brown Findlay

Charlotte Keene

Billy Postlethwaite

Billy Postlethwaite

Hank Murphy

Jessica Henwick

Jessica Henwick

Helen Drew

Crew4

Bert

Bert

Director

Jenny DeArmitt-Stran

Jenny DeArmitt-Stran

Writer

J

Justin Li

Editor

E

Eric Kress

Director of Photography

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Episode Summary

"Gray Goo" is episode 8 of Silo season 3. It scored 8.1/10 from 5,957 votes, ranking #4 of 10 episodes this season (season average 8.0). Directed by Bert and written by Jenny DeArmitt-Stran, it aired on August 20, 2026.

Next: E9 · Farewell Best of Season 3