Sam Wood	...	(Director)
Robert Pirosh, George Seaton	...	(Writer)
Groucho Marx	...	Dr. Hackenbush (as The Marx Brothers)
Chico Marx	...	Tony (as The Marx Brothers)
Harpo Marx	...	Stuffy (as The Marx Brothers)
Allan Jones	...	Gil
Maureen O'Sullivan	...	Judy
Margaret Dumont	...	Mrs. Upjohn
Leonard Ceeley	...	Whitmore
Douglass Dumbrille	...	Morgan
Esther Muir	...	'Flo'
Sig Ruman	...	Dr. Steinberg (as Sig Rumann)
Robert Middlemass	...	Sheriff
Vivien Fay	...	Dancer
Ivie Anderson	...	Vocalist
The Crinoline Choir	...	Vocal Ensemble

Summary: Doctor Hugo Hackenbush, Tony, and Stuffy try and save Judy's farm by winning a big race with her horse. There are a few problems. Hackenbush runs a high priced clinic for the wealthy who don't know he has his degree in Veterinary Medicine.