The Greatest Power

Ethel Barrymore

Miriam Monroe

William B. Davidson

John Conrad

Harry Northrup

Albert Bernard (as Harry S. Northrup)

Frank Currier

Randolph Monroe

William Black

Bradford Duncan

Cecil Owen

Eric Johansen

Frederick Truesdell

Prof. Poole (as Fred C. Truesdell)

Redfield Clarke

Maj. Gen. Foster (as Redfield Clark)