The Mystery of Mr. X
"A story of a handsome thief in evening clothes who single handed solves the crime that baffled Scotland Yard!"
A sophisticated jewel thief tries to prove himself innocent of a string of cop murders.
Directed by Edgar Selwyn
Written by: Philip MacDonald, Howard Emmett Rogers
Produced by Lawrence Weingarten
Where to watch in 
United States
Switch country in the top-right to check availability elsewhere.
Not streaming yet in United States
Be the first to know when The Mystery of Mr. X lands on a major platform
Drop your email and we'll send you ONE message the moment The Mystery of Mr. X is streaming on a major platform in United States. No spam. Cancel anytime.
While you wait
Similar titles streaming now in United States
Want to check the major streaming services manually?
Or switch country at the top to check availability elsewhere. The Mystery of Mr. X may be streaming in another market.
Who's in it
Tap any actor to see their other movies and shows.
More like The Mystery of Mr. X
Audience picks based on what people who watched this also enjoyed.
The Maltese Falcon
1941
The Hot Rock
1972
The Alphabet Murders
1965
The Pink Panther
2006
Ocean's Eleven
1960
The Interview
1998
They Made Me a Fugitive
1947
The Adventures of Sherlock Holmes
1939
Pushover
1954
The Return of the Pink Panther
1975
He Walked by Night
1949
Plunder Road
1957
More from Robert Montgomery
Their other work, ranked by what audiences actually watched.
Mr. & Mrs. Smith
1941
They Were Expendable
1945
Here Comes Mr. Jordan
1941
Lady in the Lake
1946
That's Entertainment!
1974
Ride the Pink Horse
1947
The Divorcee
1930
The Big House
1930
Night Must Fall
1937
That's Entertainment, Part II
1976
What's My Line?
1950
Rage in Heaven
1941
More from Elizabeth Allan
Their other work, ranked by what audiences actually watched.
Camille
1936
Mark of the Vampire
1935
A Tale of Two Cities
1935
Went the Day Well?
1942
David Copperfield
1935
No Highway in the Sky
1951
Grip of the Strangler
1958
A Woman Rebels
1936
Men in White
1934
The Lodger
1932
The Heart of the Matter
1953
Folly to Be Wise
1952
More from Edgar Selwyn
Their other work, ranked by what audiences actually watched.
Films from United States of America, streaming in United States
The Last Sunrise
2026
Obsession
2026
Spider-Man: No Way Home
2021
The Last House
2026
Project Hail Mary
2026
War of the Worlds
2025
Avengers: Infinity War
2018
Greenland 2: Migration
2026
Masters of the Universe
2026
The Odyssey
2026
Avatar Aang: The Last Airbender
2026
Avatar: Fire and Ash
2025