 Lew AyresOliver Duffy | Oliver Duffy |
 Laraine DayEdwina 'Eddie' Brown | Edwina 'Eddie' Brown |
 Basil RathboneCesar Ferrari / Dr. H. Santelle | Cesar Ferrari / Dr. H. Santelle |
 Walter KingsfordDr. Cromwall | Dr. Cromwall |
 Miles ManderDr. Kurt Immelman | Dr. Kurt Immelman |
 Charles D. BrownPolice Inspector Gallagher | Police Inspector Gallagher |
 Cliff ClarkPolice Lieutenant Allison | Police Lieutenant Allison |
 James FlavinPolice Lieutenant Schaeffer | Police Lieutenant Schaeffer |
 Russell GleasonOgilvie | Ogilvie |
 William TannenDevlan | Devlan |
 Mark DanielsHaguey | Haguey |
 Bert RoachKrum | Krum |
 Russell HicksDr. Chandley | Dr. Chandley |
 Charles WagenheimFred F. Bixley | Fred F. Bixley |
 Robert HomansOfficer O'Garrity | Officer O'Garrity |
 Iris AdrianBabe Stanton (uncredited) | Babe Stanton (uncredited) |
| MMargaret BertMrs. Geversar (uncredited) | Mrs. Geversar (uncredited) |
 Sam AshTheater Stage Manager (uncredited) | Theater Stage Manager (uncredited) |
| RRobert BradfordWhistles 'Over the Rainbow' (uncredited) | Whistles 'Over the Rainbow' (uncredited) |
| RRalph BrooksDr. Shepherd (uncredited) | Dr. Shepherd (uncredited) |
 Milton ParsonsJarvis J. Banhoff (uncredited) | Jarvis J. Banhoff (uncredited) |
 Eddie BuzardTall Newsboy (uncredited) | Tall Newsboy (uncredited) |
| BBobby CallahanSmall Newsboy (uncredited) | Small Newsboy (uncredited) |
 George M. CarletonMeeting Chairman (uncredited) | Meeting Chairman (uncredited) |
 Eddy ChandlerBill (uncredited) | Bill (uncredited) |
 Mary CurrierMiss Hewitt (uncredited) | Miss Hewitt (uncredited) |
| LLeslie DenisonPaul (uncredited) | Paul (uncredited) |
 Roger MooreJim (uncredited) | Jim (uncredited) |
 Jules CowlesCrazy Man at the Clinic (uncredited) | Crazy Man at the Clinic (uncredited) |
 Ralph DunnPoliceman Outside Clinic (uncredited) | Policeman Outside Clinic (uncredited) |
