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The Greatest Power

191750mNRMovieDrama

Miriam Monroe and John Conrad are two young scientific workers who, independently of each other, have discovered a chemical called exonite. Miriam discovered it while searching for a cure for cancer, while Conrad used it as a basis for a powerful explosive.

DirectorsEdwin Carewe·Edward LeSaint
WriterLouis Wolheim

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The Greatest Power was released on June 18, 1917 but we couldn't find it on any streaming service yet. Rights can change — try again later.

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Cast · Directed by Edwin Carewe

EBEthel Barrymore
Ethel Barrymore
Miriam Monroe
WDWilliam B. Davidson
William B. Davidson
John Conrad
HNHarry Northrup
Harry Northrup
Albert Bernard (as Harry S. Northrup)
FCFrank Currier
Frank Currier
Randolph Monroe
WB
William Black
Bradford Duncan
CO
Cecil Owen
Eric Johansen
FTFrederick Truesdell
Frederick Truesdell
Prof. Poole (as Fred C. Truesdell)
RC
Redfield Clarke
Maj. Gen. Foster (as Redfield Clark)
RC
Rudolph De Cordova
Williams
WA
W.M. Armstrong
Capt. Herbert

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The Greatest Power — streaming FAQ

Which OTT platform streams The Greatest Power?

The Greatest Power isn't streaming anywhere in Canada yet.

Is The Greatest Power on Netflix?

No, The Greatest Power is not on Netflix in Canada as of September 2026.

Is The Greatest Power on Amazon Prime Video?

No, The Greatest Power isn't on Amazon Prime Video in Canada right now.

Where can I watch The Greatest Power for free?

The Greatest Power isn't streaming in Canada yet, so there's no way to watch it free at the moment.

What is the OTT release date for The Greatest Power?

The Greatest Power hasn't started streaming in Canada yet. Based on the typical 6–8 week theatrical-to-streaming window, we estimate it will arrive around August 6, 1917. This is a prediction, not a confirmed date.