The Alienist stars Daniel Brühl as Dr. Laszlo Kreizler, Luke Evans as John Moore, and Dakota Fanning as Sara Howard, following a team investigating a series of gruesome murders in 1890s New York.
Main cast
- Dr. Laszlo KreizlerDaniel Brühl1–2Main
- John MooreLuke Evans1–2Main
- Sara HowardDakota Fanning1–2Main
Supporting cast
- Marcus IsaacsonDouglas Smith1–2Supp
- Lucius IsaacsonMatthew Shear1–2Supp
- Captain ConnorDavid Wilmot1Supp
- Theodore RooseveltBrian Geraghty1Supp
- Mary PalmerQ’orianka Kilcher1–2Supp
- Stevie TaggertMatt Lintz1–2Supp
- Cyrus MontroseRobert Ray Wisdom1–2Supp
- Libby HatchTed Levine2Supp
Guest & voice
- Willem van BergenJake Abel1Guest
- FloraEmily Barber1Guest
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About this cast
The Alienist is a period psychological thriller set in 1896 New York City. It follows Dr. Laszlo Kreizler, a criminal psychologist, alongside newspaper illustrator John Moore and police secretary Sara Howard as they unofficially investigate a serial killer targeting boy prostitutes. The series is based on Caleb Carr’s novel of the same name.
FAQs
Who plays Dr. Laszlo Kreizler in The Alienist?
Daniel Brühl plays Dr. Laszlo Kreizler, the titular alienist (a term for an early psychologist).
Is The Alienist based on a book?
Yes, it is based on the 1994 novel The Alienist by Caleb Carr.
How many seasons of The Alienist are there?
Two seasons: The Alienist (2018) and The Alienist: Angel of Darkness (2020).
Where can I watch The Alienist in the UK?
The series is available on Netflix UK.
Who plays Sara Howard in The Alienist?
Dakota Fanning plays Sara Howard, a determined police secretary who becomes a key investigator.
Sources & where to watch: IMDb · Wikipedia · Where to watch (JustWatch UK) · Updated June 2026