Pat O'BrienMichael O'Flaherty 'Speed' McBride Rudy ValleeGordon Tolliver Fortunio BonanovaProf. Zorado Joseph CrehanDr. James P. Whitney Jason Robards Sr.Henry Fletcher Jack NortonWilliam T. Lafferty Robert HomansUncle Barney McBride (uncredited) Tom KennedyBartender (uncredited) Carl SwitzerIgnatius Lafferty (uncredited) Robert FellowsExecutive Producer Theron WarthAssociate Producer Victor A. GangelinSet Decoration Darrell SilveraSet Decoration Alfred HermanArt Direction Albert S. D'AgostinoArt Direction Frank RedmanDirector Of Photography Edward StevensonCostume Design James E. CaseyAssistant Director C. BakaleinikoffMusic Director James G. StewartSound Re-Recording Mixer Leigh HarlineOriginal Music Composer 
