Legion Reality TV Guide: Format, Cast and Facts
A TMDB-backed guide to Legion, including cast, release facts, genres and watch-provider notes.

Legion (2017) — an evergreen reference for this TV series: the essentials, the cast, where to watch and what to watch next. Open your third eye.
Where to watch
TMDB's U.S. watch-provider data lists Hulu. Availability changes by country and date, so check your streaming app before watching.
Cast
Dan Stevens as David Haller / Legion; Rachel Keller as Sydney ‘Syd’ Barrett; Aubrey Plaza as Lenny Busker; Jeremie Harris as Ptonomy Wallace; Amber Midthunder as Kerry Loudermilk; Bill Irwin as Cary Loudermilk; Hamish Linklater as Clark Debussy; Lauren Tsai as Jia-Yi / Switch
About Legion
David Haller, AKA Legion, is a troubled young man who may be more than human. Diagnosed as schizophrenic, David has been in and out of psychiatric hospitals for years. But after a strange encounter with a fellow patient, he’s confronted with the possibility that the voices he hears and the visions he sees might be real.
More like Legion
- Jupiter's Legacy
- Black Lightning
- Helstrom
- Heroes
- Marvel's Jessica Jones
- Peacemaker
- Gotham
- Marvel's Cloak & Dagger
Figures and availability come from public TMDB data and are provided as a sourced reference.
Frequently asked questions
Where can I watch Legion?
TMDB's U.S. watch-provider data lists Hulu. Availability changes by country and date, so check your streaming app before watching.
Who is in the cast of Legion?
Dan Stevens as David Haller / Legion; Rachel Keller as Sydney ‘Syd’ Barrett; Aubrey Plaza as Lenny Busker; Jeremie Harris as Ptonomy Wallace; Amber Midthunder as Kerry Loudermilk; Bill Irwin as Cary Loudermilk; Hamish Linklater as Clark Debussy; Lauren Tsai as Jia-Yi / Switch
Is this Legion guide official?
No. It uses TMDB data as a reference and is not endorsed or certified by TMDB.



