The Shakiest Gun in the West (1968)

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