Jesse W. Haywood (Don Knotts) graduates from dental school in Philadelphia in 1870 and goes west to become a frontier dentist. Penelope "Bad Penny" Cushing (Barbara Rhoades) is offered a pardon if she will track down a ring of gun smugglers. She tricks Haywood into a sham marriage as a disguise. Haywood inadvertently becomes the legendary "Doc the Haywood" after he guns down "Arnold the Kid".
Don Knotts
as Dr. Jesse W. Heywood
Barbara Rhoades
as Penelope 'Bad Penny' Cushings
Jackie Coogan
as Matthew Basch
Ruth McDevitt
as Mrs. Olive Heywood
Frank McGrath
as Mr. Remington
Terry Wilson
as Welsh
Carl Ballantine
as Abel Swanson
Pat Morita
as Wong
Robert Yuro
as Arnold the Kid
Herb Voland
as Dr. Friedlander
Fay DeWitt
as Violet
Dub Taylor
as Pop Cushings
