Moe Howard
— Dr. Howard
Larry Fine
— Dr. Fine
Curly Howard
— Dr. Howard
Dell Henderson
— Dr. Graves (uncredited)
Phyllis Crane
— Anna Conda (uncredited)
'Little Billy' Rhodes
— Tiny Patient (uncredited)
Kay Hughes
— Nurse (uncredited)
Irene Coleman
— Nurse
Jeanie Roberts
— Hiccupping Nurse (uncredited)
Hank Mann
— Glass Door Man (uncredited)
Billy Gilbert
— Dangerous Patient (uncredited)
Bud Jamison
— Tiny Patient’s Doctor (uncredited)
Charles King
— Anesthesiologist (uncredited)
Charles Dorety
— Doctor (uncredited)