A Great Line Exchange
Near the end of this sharp version of the Wyatt Earp-Doc Holliday buddy legend, Wyatt Earp (James Garner) and his old, dying friend Doc Holliday (Jason Robards) ride alone together south of the border into Mexico and a deserted village where Earp's arch-enemy Ike Clanton is believed to be hiding out.
Earp and Holliday exchange this dialogue:
Doc Holliday: You got some kind of plan?
Wyatt Earp : I have.
Doc Holliday: Want to tell me about it?
Wyatt Earp : We take whoever gets in our way.
Doc Holliday: You call that a plan?
Wyatt Earp: You got a better one?
Doc Holliday (after a pause): No.
What's great is how Jason Robards, as Doc Holliday, says "no." He says it in the tired voice of a man who could die at any moment. He says it with a certain resignation. He says it as if deciding that he'll stick by his friend Earp to the end.
It's one of the best readings of the word "no" I've ever heard in a movie.