Devil in Disguise: John Wayne Gacy Billy (Season 1, Episode 4)
TV-MA
TV Episode | 60 min | Crime, Drama

Devil in Disguise: John Wayne Gacy

Billy (Season 1, Episode 4)

TV-MA

TV Episode | 60 min | Crime, Drama

A psychiatrist uncovers Gacy's dark history while Tovar and Kozenczak examine how systems failed to stop his murders. Meanwhile, Billy Kindred and Maryjane's romance develops.

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Cast	+ Add Cast
29 cast members

Name	Known for
Michael Chernus John Wayne Gacy John Wayne Gacy See fewer	Severance (2022)
Gabriel Luna Rafael Tovar Rafael Tovar See fewer	Terminator: Dark Fate (2019)
Michael Angarano Sam Amirante Sam Amirante See fewer	Sky High (2005)
James Badge Dale Joe Kozenczak Joe Kozenczak See fewer	The Departed (2006)
Marin Ireland Elizabeth Piest Elizabeth Piest See fewer	Hell or High Water (II) (2016)
Chris Sullivan Bill Kunkle (credit only) Bill Kunkle (credit only) See fewer	This Is Us (2016)
Cricket Brown Kerry Piest Kerry Piest See fewer	The Unholy (2021)
Greg Bryk Harold Piest Harold Piest See fewer	Saw V (2008)
Ted Dykstra Det. Allen Fanholm Det. Allen Fanholm See fewer	2 Pianos 4 Hands (2021)
Eric Wiegand Danny Jockell Danny Jockell See fewer	Law & Order: Special Victims Unit (1999)
Samantha Adams Marlynn Gacy Marlynn Gacy See fewer	The Greatest
Hudson Ambrose Young John Wayne Gacy Young John Wayne Gacy See fewer	Devil in Disguise: John Wayne Gacy (2025)
Steven Andrews Dead Male Body 2 Dead Male Body 2 See fewer	My Rocking Chair (2024)
Greg Atkins Ben Ben See fewer	Devil in Disguise: John Wayne Gacy (2025)
Brenda Bazinet Eugenia Godzik Eugenia Godzik See fewer	Dangerous (III) (2021)
Jessie Behan Young Marion Gacy Young Marion Gacy See fewer	Crossroad Springs (2025)
Kathryn Bellamy Beth Beth See fewer	Painkiller (2023)
Alec Dahmer Rookie Cop Rookie Cop See fewer	Bajillionaires (2018)
Benjamin Forrester Dead Male Body 1 Dead Male Body 1 See fewer	Odd Squad (2014)
Roger Honeywell John Stanley Gacy John Stanley Gacy See fewer	Resident Evil 3: Nemesis (1999)
Andrew Johnston Donald Voorhees Jr. Donald Voorhees Jr. See fewer	Coming Distractions (2017)
Joshua Kilimnik Teenage Gacy Teenage Gacy See fewer	Odd Squad (2014)
Robert Meynell Donald Voorhees Sr. Donald Voorhees Sr. See fewer	Mrs. America (2020)
Thom Nyhuus Kenneth Piest Kenneth Piest See fewer	Albatross (II) (2022)
Nigel Shawn Williams John Davis John Davis See fewer	John Q (2002)
Mallory Bechtel Mary Jane (uncredited) Mary Jane (uncredited) See fewer	Pretty Little Liars: Original Sin (2022)
Quincy Tyler Bernstine Dr. Healy (uncredited) Dr. Healy (uncredited) See fewer	The Tender Bar (2021)
Michael Esper Bob Motta (uncredited) Bob Motta (uncredited) See fewer	The Drop (2014)
Colton Ryan Billy Kindred (uncredited) Billy Kindred (uncredited) See fewer	The Girl from Plainville (2022)