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The Unknown Quantity

8.0191950mNRMovieDrama

Mary Boyne, who made shirts at four dollars a week, had no place for love in her life - only despair and hate for the son of the man who had plunged her family into deepest distress. Peter Kenwitz loved Mary, but because he was a…

DirectorThomas R. Mills
WritersG. Marion Burton·O. Henry

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The Unknown Quantity was released on April 14, 1919 but we couldn't find it on any streaming service yet. Rights can change — try again later.

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Cast · Directed by Thomas R. Mills

CGCorinne Griffith
Corinne Griffith
Mary Boyne
HGHuntley Gordon
Huntley Gordon
Dan Kinsolving
HDHarry Davenport
Harry Davenport
Septimus Kinsolving
JMJack McLean
Jack McLean
Sammy Boyne
JR
Jack Ridgeway
Thomas Boyne
FB
F.R. Buckley
Peter Kenwitz

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The Unknown Quantity — streaming FAQ

Which OTT platform streams The Unknown Quantity?

The Unknown Quantity isn't streaming anywhere in United States yet.

Is The Unknown Quantity on Netflix?

No, The Unknown Quantity is not on Netflix in United States as of August 2026.

Is The Unknown Quantity on Amazon Prime Video?

No, The Unknown Quantity isn't on Amazon Prime Video in United States right now.

Where can I watch The Unknown Quantity for free?

The Unknown Quantity isn't streaming in United States yet, so there's no way to watch it free at the moment.

What is the OTT release date for The Unknown Quantity?

The Unknown Quantity hasn't started streaming in United States yet. Based on the typical 6–8 week theatrical-to-streaming window, we estimate it will arrive around June 2, 1919. This is a prediction, not a confirmed date.