 James GleasonPolice Insp. Oscar Piper | Police Insp. Oscar Piper |
 Zasu PittsHildegarde Withers | Hildegarde Withers |
 Owen Davis Jr.Robert Wilkins | Robert Wilkins |
 Louise LatimerAlice Stevens | Alice Stevens |
 Arthur AylesworthKendall | Kendall |
 Paul FixJoe | Joe |
 Richard TuckerJohn Carter | John Carter |
 Barbara BarondessMarie | Marie |
 James DonlanJim | Jim |
 Agnes AndersonDagmar | Dagmar |
 Oscar ApfelRobbins | Robbins |
| AAlyce ArdellJosephine, Hildegarde's Maid (uncredited) | Josephine, Hildegarde's Maid (uncredited) |
| JJohn T. BamburyMidget (uncredited) | Midget (uncredited) |
 Billy DooleyGas Station Attendant (uncredited) | Gas Station Attendant (uncredited) |
 Frank FanningDetective Fanning (uncredited) | Detective Fanning (uncredited) |
 Mary GordonWoman with Bag (uncredited) | Woman with Bag (uncredited) |
 Reed HowesMuseum Guard in Egyptian Room (uncredited) | Museum Guard in Egyptian Room (uncredited) |
| JJohn IndrisanoMan in Line for Inspection (uncredited) | Man in Line for Inspection (uncredited) |
 Lew KellyCassidy, a Policeman (uncredited) | Cassidy, a Policeman (uncredited) |
 John MilternMr. Gordon, Museum Guard (uncredited) | Mr. Gordon, Museum Guard (uncredited) |
| TTom QuinnFirst Hatless Suspect (uncredited) | First Hatless Suspect (uncredited) |
 Bodil RosingTheresa the Cook (uncredited) | Theresa the Cook (uncredited) |
| GGeorge SorelMan Threatening Carter (uncredited) | Man Threatening Carter (uncredited) |
