Elenco (na ordem dos créditos)
Geoff Pierson
Narrator
Kurk Kasparian
Officer Joe
John Atkins
Gifford
Mariana Lilla
Neighboor
Eric Reingrover
Matt Owens
Ali Zahiri
SGT Joel Grahan
Chad Steers
Detective Larry Nagle
Todd Gajdusek
Detective Byron Redburn
Xylie Morales
Daughter
Brad Worch II
Chris Fortin
Harvey B. Jackson
Nome Alaska PD Ofc.
Anthia Gillick
Jonetta
Jeff Rector
Police Chief Burroughs 2019
Skye Roberts
Anne
Chelsea Kwoka
Mary McDonald
Drew Hale
Chester
Michael Joseph Nelson
Von
Claude Duhamel
Marty
Ben Stobber
Henry Kavanaugh
Carla Betz
Gwen
Shannon Bengston
Anna Davies
Jake Reiner
Off-duty cop
Madeleine Falk
Lt. Fajardo
Brooklyn McDaris
Melissa Padilla
Elester Latham
lonnie david franklin sr.
Olivia Cordell
Timayre
Mike Caravella
Convenience Store Manager
John C. Woodley
Tom Kapsak
Tony Bartele
(Younger) Lonnie David Franklin Jr. (Grim Sleeper)
Ambyr McWilliams
Evelyn
Camilla Werner-Longo
Allison Warren
Darrel Guilbeau
Polygraph Expert
Nate Ward
Det. Mark Schmitzer
Jensen Higley
Rhonda
Stephanie Domini
Lois Gibson
Henry Mark
Medical Examiner
Natalia Christabelle
Young Woman
Dylan Beam
Cindy Allinger
David M. Edelstien
Older Cliff Shepard
Emily Bolt
Preston Butler III
Detective 2
Katy Foley
Trooper Valentine
Brooke Hayley Martin
Young Mary Deering
Alysse Fozmark
Emma
Chris Paseka
Melanie Thompson
Sara Jones
Mark E. Safarik
Self - FBI Special Agent
Kit Chester
Jenna
Colin Ward
Detective #1
Kaylin Zeren
Kerri Cathcart
Marc Rosenzweig
Donny Donnelly
Bryn Woznicki
Young Dorothy
Juston Graber
Detective Walton
Anthony Richard Pagliaro
Police Officer
Johnson Cooley
Detective Adamson
Dan Glenn
Detective Eric Burroughs
Beth Silverman
Self
Emily Marie Reed
Natalie
Eric Schwartz
David Johnson
Bryan Staggers
Rasmussen
Markos Zepeda
Eyewitness
Paul Burt
Polyographer
Amelija Hill
Ashley Allinger
Natasha Staton
Mary Lowe
Clifford Shepard
Talyn Fiore
Detective Teresa Berg
Garrison Oliver Gross
Officer Paul Souza
Pia Vicioso-Vila
Detective J. Diem
Diana Ware
Robert R. Ryel
Dan Murphy
Jimmy lee lingle
Chef
Joshua Paul Buente
BBQ Neighbor
Kendra Serelle
Kimberly Morgan
Jenalyn Culhane
Sonya
Dot McDonald
Irene Ephraim
Julien Theo
Carl Franklin
Michael Tari
Jose Hernandez
Alexis Sherrill
Bernita Sparks (uncredited)