Synopsis
The chilling story of one of the world’s most notorious serial killers told through the words of Gacy himself, those who were forever changed by his unspeakable deeds and those who believe that the full truth remains concealed to this day.
Series Information
- First Aired
- 2021
- Last Aired
- 2021
- Seasons
- 1
- Episodes
- 6
- Genre
- Documentary, Crime
- Network
- Peacock
- Status
- Ended
- Rating
- 7.0 / 10 (26 votes)
Top Cast
Terry Sullivan
Self - Fmr. Prosecutor, Cook County, IL
John Wayne Gacy
Archive footage
Official Trailer
Ready to watch John Wayne Gacy: Devil in Disguise?
All seasons & episodes — free, HD, no signup.
▶ Watch John Wayne Gacy: Devil in Disguise FreeSimilar Shows
Dateline
1992 ★ 6.5
John Lennon: Murder Without a Trial
2023 ★ 7.2
Cold Case: Who Killed JonBenét Ramsey
2024 ★ 7.3
Unsolved Mysteries
1988 ★ 7.7
American Gothic
1995 ★ 7.4
The Bunker Woman
2024 ★ 6.0
Road trip fatal
2024 ★ 7.0
The Hillside Strangler: Devil in Disguise
2022 ★ 6.0
Killing Grounds: The Gilgo Beach Murders
2026 ★ 6.8
Slasher: Flesh & Blood
2021
I Just Killed My Dad
2022 ★ 7.1
Dateline: Unforgettable
2021 ★ 7.0
The Evandro Case: A Devilish Plot
2021 ★ 9.2
Prodigal Son
2019 ★ 8.1
You May Also Like
Death of the Pastor's Wife
2026 ★ 7.9
I AM A KILLER
2018 ★ 6.8
Trust Me: The False Prophet
2026 ★ 7.5
The Idaho Murders: College Nightmare
2026 ★ 6.7
Conversations with a Killer: The Jeffrey Dahmer Tapes
2022 ★ 7.8
Conversations with a Killer: The Son of Sam Tapes
2025 ★ 7.2
Drugs, Inc.
2010 ★ 8.3
World's Most Wanted
2020 ★ 6.8
Crime Scene: The Texas Killing Fields
2022 ★ 6.5
D.B. Cooper: Where Are You?!
2022 ★ 5.9
Evil Lives Here
2016 ★ 8.0
Killer Sally
2022 ★ 6.7
Gone Girls: The Long Island Serial Killer
2025 ★ 7.3
Homicide Hunter: Lt Joe Kenda
2011 ★ 8.9
More Documentary Series
MythBusters
2003 ★ 7.8
Ancient Aliens
2010 ★ 7.1
Formula 1: Drive to Survive
2019 ★ 8.2
Marvel Studios Legends
2021 ★ 7.4
Cosmos
2014 ★ 8.5
Prehistoric Planet
2022 ★ 8.3
Planet Earth
2006 ★ 8.6
Unsolved Mysteries
2020 ★ 7.7
The Last Dance
2020 ★ 8.3
The Blue Planet
2001 ★ 8.4
Planet Earth II
2016 ★ 8.6
Blue Planet II
2017 ★ 8.6
1000 Ways to Die
2009 ★ 7.7
Cosmos: A Personal Voyage
1980 ★ 8.7
Trending Now
Silo
2023 ★ 8.2
The Gentlemen
2024 ★ 7.8
Bleach
2004 ★ 8.4
A Tale of Two Cities
2026 ★ 10.0
Reacher
2022 ★ 8.1
Lanterns
2026 ★ 8.3
The Grand Tour
2026 ★ 9.6
Lioness
2023 ★ 8.1
One Piece
1999 ★ 8.7
Dark Matter
2024 ★ 7.8
Furious
2026 ★ 7.2
Mushoku Tensei: Jobless Reincarnation
2021 ★ 8.4
The Long Watch
2026
Chad Powers
2025 ★ 8.0
Popular This Week
Watch What Happens Live with Andy Cohen
2009 ★ 4.9
The Mentalist
2008 ★ 8.4
El conquistador
2005 ★ 5.7
Tagesschau
1952 ★ 6.8
Come Home Love: Lo and Behold
2017 ★ 5.4
Ted Lasso
2020 ★ 8.4
Law & Order: Special Victims Unit
1999 ★ 8.0
The Simpsons
1989 ★ 8.0
The Rookie
2018 ★ 8.5
Paradise Hotel
2005 ★ 5.6
The Tonight Show Starring Jimmy Fallon
2014 ★ 5.8
Coronation Street
1960 ★ 5.4
REBORN!
2006 ★ 8.1
NCIS
2003 ★ 7.6
Explore related titles
Frequently Asked Questions
Where can I watch John Wayne Gacy: Devil in Disguise online for free?
You can watch every season and episode of John Wayne Gacy: Devil in Disguise online for free in HD on FreeFlix. No signup required.
How many seasons of John Wayne Gacy: Devil in Disguise are there?
John Wayne Gacy: Devil in Disguise has 1 season and 6 episodes, all available on FreeFlix.
Is John Wayne Gacy: Devil in Disguise available in HD?
Yes, all episodes of John Wayne Gacy: Devil in Disguise stream in HD with multiple backup sources.
Do I need an account or subscription?
No. FreeFlix is 100% free with no registration, payment, or account required.