The Serial Killer's Apprentice poster
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The Serial Killer's Apprentice

6.420251h 23mMovieDocumentaryCrime

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.

ProducerDick Wolf

Where to watch

Discovery +Discovery +
Availability shown for Canada · rights vary by country

Cast

KR
Katherine Ramsland
Self
WHWayne Henley
Wayne Henley
Self (voice)

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The Serial Killer's Apprentice — streaming FAQ

Which OTT platform streams The Serial Killer's Apprentice?

The Serial Killer's Apprentice is streaming on Discovery + in Canada. It's not currently on Netflix.

Is The Serial Killer's Apprentice on Netflix?

No, The Serial Killer's Apprentice is not on Netflix in Canada as of October 2026. It's currently on Discovery +.

Is The Serial Killer's Apprentice on Amazon Prime Video?

No, The Serial Killer's Apprentice isn't on Amazon Prime Video in Canada right now. It's on Discovery + instead.

Where can I watch The Serial Killer's Apprentice for free?

The Serial Killer's Apprentice is available on Discovery + in Canada, but you'll need an active subscription — there's no free option right now.