John LongdenDetective Frank Webber Harvey BrabanThe Chief Inspector Ex-Det. Sergt. BishopThe Detective Sergeant Alfred HitchcockMan on Subway (uncredited) / Director / Screenplay Johnny AshbyBoy (uncredited) Joan BarryAlice White (voice) (uncredited) Johnny ButtSergeant (uncredited) Phyllis KonstamGossiping Neighbour (uncredited) Sam LiveseyThe Chief Inspector (silent version) (uncredited) Phyllis MonkmanGossip Woman (uncredited) Percy ParsonsCrook (uncredited) Alfred HitchcockMan on Subway (uncredited) / Director / Screenplay C. Wilfred ArnoldArt Direction Norman G. ArnoldArt Direction Jack E. CoxDirector Of Photography Frank MillsAssistant Director Hubert BathOriginal Music Composer Dallas BowerSound Recordist Reginald ConnellyOriginal Music Composer Harry StaffordMusic Arranger Jimmy CampbellOriginal Music Composer Charles BennettTheatre Play 
