| 角色 | 饰演者介绍 |
| Dr. Barnaby Fulton | 加里·格兰特 |
| Mrs. Edwina Fulton | 金格尔·罗杰斯 |
| Miss Lois Laurel | 玛丽莲·梦露 |
| Mr. Oliver Oxley | 查尔斯·科本 |
| Hank Entwhistle | 休·马洛威 |
| Dr. Jerome Kitzel | Henri Letondal |
| Dr. Zoldeck | Robert Cornthwaite |
| G.J. Culverly | Larry Keating |
| Dr. Brunner | Douglas Spencer |
| Mrs. Rhinelander | Esther Dale |
| Little Indian | 乔治·温斯罗 |
| Student (uncredited) | Charlotte Austin |
| Scientist (uncredited) | Harry Bartell |
| Dowager (uncredited) | Faire Binney |
| Reporter (uncredited) | 小哈里·凯瑞 |
| Johnny's Mother (uncredited) | Olive Carey |
| Scientist (uncredited) | Harry Carter |
| Bit Boy (uncredited) | Ronnie Clark |
| Policeman (uncredited) | Russ Clark |
| The House Painter (uncredited) | Heinie Conklin |
| Mr. Peabody Auto Salesman (uncredited) | George Eldredge |
| Mrs. Brannigan Neighbor (uncredited) | Kathleen Freeman |
| Bit Boy (uncredited) | Terry Goodman |
| Cab Driver (uncredited) | Dabbs Greer |
| Man In Opening Credits (voice) (uncredited) | 霍华德·霍克斯 |
| Oxley Receptionist (uncredited) | Marjorie Holiday |
| Bit Boy (uncredited) | Rudy Lee |
| Bit Boy (uncredited) | Louis Lettieri |
