The Shakiest Gun in the West (1968) starring Don Knotts, Barbara Rhoades
In short, The Shakiest Gun in the West is a very funny Don Knotts movie. Set in the American Old West, Don plays the part of Jesse W. Haywood, a recent graduate from Dentistry school. He is going out west to make his fortune. His final exam in dentistry school is funny, as is his boarding the train out West. Along the way, his stagecoach is held up by two robbers (his reaction being very funny in itself). And one of the two robbers is a lovely woman, “Bad Penny” Cushing (Barbara Rhoades). But, she is soon arrested, and given an opportunity for a pardon in exchange for infiltrating a wagon train heading out west …. And to break up a ring of gun smugglers.