The Greatest Power
Plot: 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

Ethel Barrymore
William B. Davidson
Harry Northrup
Frank Currier
William Black
Frederick Truesdell
Edwin Carewe
Edward LeSaint
Louis Wolheim