The Mystery Girl poster
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The Mystery Girl

191850mMovieCrimeDrama

Prince Sebastian of Lurania is forced to go into hiding when German forces invade his country. His niece, Countess Therese, is an ambulance driver with the French army. Her uncle requests that she meet him in a small town in Maine and…

DirectorWilliam C. deMille
WriterMarion Fairfax

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The Mystery Girl was released on December 22, 1918 but we couldn't find it on any streaming service yet. Rights can change — try again later.

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Cast · Directed by William C. deMille

ECEthel Clayton
Ethel Clayton
Countess Therese
HWHenry Woodward
Henry Woodward
Captain Thomas K. Barnes
CBClarence Burton
Clarence Burton
Prince Ugo
CWCharles West
Charles West
Chester Naismith
WHWinter Hall
Winter Hall
Prince Sebasatian
MKMayme Kelso
Mayme Kelso
Merecedes Thackery
JJ
J. Parks Jones
Ferdust

More from Ethel Clayton · Lead actress

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More from William C. deMille · Director

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The Mystery Girl — streaming FAQ

Which OTT platform streams The Mystery Girl?

The Mystery Girl isn't streaming anywhere in Philippines yet.

Is The Mystery Girl on Netflix?

No, The Mystery Girl is not on Netflix in Philippines as of September 2026.

Is The Mystery Girl on Amazon Prime Video?

No, The Mystery Girl isn't on Amazon Prime Video in Philippines right now.

Where can I watch The Mystery Girl for free?

The Mystery Girl isn't streaming in Philippines yet, so there's no way to watch it free at the moment.

What is the OTT release date for The Mystery Girl?

The Mystery Girl hasn't started streaming in Philippines yet. Based on the typical 6–8 week theatrical-to-streaming window, we estimate it will arrive around February 9, 1919. This is a prediction, not a confirmed date.