This is an interesting black comedy, from Joseph Mankiewicz, about the gullibility of man, and how greed can corrupt anyone. Henry Fonda is a lawman, in typical Fonda-style (before WARLOCK and the spaghetti westerns changed his image). He is a firm support for law and order. However, he has been shot and left lame by Warren Oates, a drunken outlaw. He may have to retire as a result sooner than he expected.
At the start of the film we watch how Kirk Douglas (Paris Pitman) has robbed the home of Arthur O'Connor with his gang. They are killed off in one way or another. Pitman escapes with the money, and hides it in a hole full of rattlesnakes. But later he is captured. Pitman is sent to territorial prison, where he meets Oates, Burgess Meredith (as the legendary Missouri Kid), Hume Cronym and John Randolph (a pair of swindlers who are also a gay couple), and others. The warden is Martin Gabel, who soon makes it clear that if Douglas wants to be out sooner he needs the warden as a partner. But in a riot Gabel is killed, and Fonda is appointed the new warden.
Fonda tries to reform the prison, improving facilities and setting up an honor system. Douglas, the total cynic, sneers at all this, and makes his own plans. He is not going to rot for two decades or so in prison while a fortune awaits for him. So he starts plotting to get out, and Fonda keeps watching to counter his plotting.
I won't add anything else, but in the end one wonders if Paris Pitman's view of mankind is the truth of us all or not. The film has wonderful sharp comedy, including the comic put-downs of Cronyn when undercutting the pompous Randolph, and when one sees scenes like Burgess Meredith taking his first bath. I strongly recommend this film to fans of unusual westerns.