莱昂内尔·阿特威尔

Lionel Atwill

饰：Dr. Jerry Xavier

菲伊·雷

Fay Wray

饰：Joanne 'Joan' Xavier

李·屈赛

Lee Tracy

饰：Lee Taylor, Daily World Reporter

普雷斯顿·福斯特

Preston Foster

饰：Dr. Wells (Academy of Surgical Research)

约翰·雷

John Wray

饰：Dr. Haines, Academy of Surgical Research

哈利·贝雷斯福德

饰：Dr. Duke, Academy of Surgical Research

阿瑟·埃蒙德·卡鲁维

Arthur Edmund Carewe

饰：Dr. Rowitz, Academy of Surgical Research

Leila Bennett

饰：Mamie, Xavier's Maid

罗伯特·沃里克

Robert Warwick

饰：Police Commissioner Stevens

George Rosener

饰：Otto, Dr. X's Butler

威拉德·罗伯逊

Willard Robertson

饰：Detective O'Halloran

Thomas E. Jackson

饰：Daily World Editor (as Thomas Jackson)

Harry Holman

饰：Mike, Waterfront Policeman

梅·巴斯奇

Mae Busch

饰：Cathouse Madame

汤姆·杜根

Tom Dugan

饰：The Sheriff

塞尔默杰克逊

Selmer Jackson

饰：Willard Keefe, Daily World Night Editor (uncredited)

Charles McMurphy

饰：Detective At Headquarters (uncredited)

Raoul Freeman

Thomas J. Dugan

Thomas J. Dugan

饰：Sheriff