The Greatest Power_
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.
Starring
Ethel Barrymore, William B. Davidson, Harry Northrup
Updated Feb 16, 2026
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Year context
The Greatest Power was released 109 years ago in 1917.
Overview
Miriam Monroe and John Conrad are two young scientific workers who, independently of each other, have discovered a chemical called exonite. Miriam discovered...
The Greatest Power is a Drama film with a runtime of 0h 50m.
CAST (10)
Ethel Barrymore
Miriam Monroe
William B. Davidson
John Conrad
Harry Northrup
Albert Bernard (as Harry S. Northrup)
Frank Currier
Randolph Monroe
WB
William Black
Bradford Duncan
CO
Cecil Owen
Eric Johansen
Frederick Truesdell
Prof. Poole (as Fred C. Truesdell)
RC
Redfield Clarke
Maj. Gen. Foster (as Redfield Clark)
Rudolph De Cordova
Williams
WA
W.M. Armstrong
Capt. Herbert
DETAILS
FREQUENTLY ASKED QUESTIONS
What is The Greatest Power about?
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.
How long is The Greatest Power?
The Greatest Power has a runtime of 50 minutes (0h 50m).
Who stars in The Greatest Power?
The cast of The Greatest Power includes Ethel Barrymore, William B. Davidson, Harry Northrup, Frank Currier, William Black.
GENRES (1)
Drama