The Twilight Zone: Mr. Denton on Doomsday (TV)

In the Far West, the drunkard Al Denton is bullied by the gunman Dan Hotaling to get some booze. The mysterious Henry J. Fate observes the humiliation and Al Denton finds a revolver on the street. When Dan sees Al Denton with a revolver on his hand, he challenges the drunk for a gunfighter. Fate observes again and makes a movement with his hand that will change the life of Al Denton.