The Serial Killer's Apprentice
Dr. Katherine Ramsland interviews Elmer Wayne Henley, the sole survivor of the 1973 Houston Mass Murders, to unravel his chilling journey from manipulated teen to convicted killer — and the terrifying truth behind the line between victim and predator.
Where to Watch
Availability: United States
Stream with Subscription
Buy
Streaming availability data provided by JustWatch.
Top Cast
Crew
Producers
More Like This
Maternal Instinct
2026 · ★ 7.1
The Mystery of D.B. Cooper
2020 · ★ 6.3
Voyeur
2017 · ★ 5.9
Ted Bundy: Mind of a Monster
2019 · ★ 7.6
Dirty John: The Dirty Truth
2019 · ★ 5.8
Aileen: Queen of the Serial Killers
2025 · ★ 7.0
A Toxic Love Story
2026 · ★ 6.5
Con Mum
2025 · ★ 6.8
Deliver Us from Evil
2006 · ★ 7.2
Evil Influencer: The Jodi Hildebrandt Story
2025 · ★ 6.2
Out of Thin Air
2017 · ★ 5.9
H.H. Holmes: America's First Serial Killer
2004 · ★ 6.2
Long Shot
2017 · ★ 7.2
Predators
2025 · ★ 6.7
The Menendez Brothers
2024 · ★ 7.2
The Crash
2026 · ★ 6.8
Murder to Mercy: The Cyntoia Brown Story
2020 · ★ 6.9
The Truth and Tragedy of Moriah Wilson
2026 · ★ 7.4
O.J.: Made in America
2016 · ★ 8.4
Whitey: United States of America v. James J. Bulger
2014 · ★ 6.4
More Featuring Katherine Ramsland
Albert Fish: In Sin He Found Salvation
2007 · ★ 5.4
Sins of the Father: The Green River Killer
2022 · ★ 6.5
The Idaho Student Murders
2025 · ★ 5.9
BTK: Confession of a Serial Killer
2022 · ★ 6.7
The Co-Ed Killer: Mind of a Monster
2021 · ★ 7.0
The Mysteries of Bradshaw Ranch: Aliens, Portals, and the Paranormal
2024 · ★ 7.0
Carl Panzram: The Spirit of Hatred and Vengeance
2011 · ★ 6.7
National Vampire
2006