Where to Watch The Unknown Quantity (1919) Online

Fancy watching 'The Unknown Quantity' in the comfort of your own home? Tracking down a streaming service to buy, rent, download, or view the Thomas R. Mills-directed movie via subscription can be a huge pain, so we here at Moviefone want to take the pressure off.

Read on for a listing of streaming and cable services - including rental, purchase, and subscription choices - along with the availability of 'The Unknown Quantity' on each platform when they are available. Now, before we get into the nitty-gritty of how you can watch 'The Unknown Quantity' right now, here are some finer points about the Vitagraph Company of America drama flick.

Released April 14th, 1919, 'The Unknown Quantity' stars Corinne Griffith, Huntley Gordon, Harry Davenport, Jack McLean The NR movie has a runtime of about 50 min, and received a user score of (out of 100) on TMDb, which assembled reviews from respected users.

What, so now you want to know what the movie's about? Here's the plot: "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 mathematician and a pessimist by trade, his love was as hopeless as her chance for happiness." .