Sylvia of the Secret ServiceDramaSylvia of the Secret ServiceDramathumb_upthumb_downSylvia of the Secret ServiceNovember 25, 1917Directed byGeorge FitzmauriceDuring World War I, a group of German saboteurs plot to blow up an ammunition dump in New York City. A secret agent sets out to stop them.US content warning Last Updated: now Request Update CastIrene CastleSylvia CarrollJ.H. GilmourVan BrunnElliott DexterCurtis PrescottSuzanne WillaFay WallingJ.W. PercivalJohn W. HomingErich von StroheimPeterMacey Harlam(uncredited)Antonio Moreno(uncredited)