2x14 A Picture of Death

Hugh Blaine: Does a trotter lift all four feet off the ground at the same time?
William Barclay 'Bat' Masterson: That's one of the oldest arguments in horse racing. For what's it's worth, I'd say when its racing, a trotting horse has all four feet off the ground.
Roger Purcell: It's not worth much without proof, Mr. Masterson.

William Barclay 'Bat' Masterson: You made a bet where the burden of proof is on you?
Hugh Blaine: Yeah.
William Barclay 'Bat' Masterson: How much is the bet?
Roger Purcell: Exactly fifty thousand dollars.
William Barclay 'Bat' Masterson: Is this some kind of joke?
Roger Purcell: If it is, the laugh's on your friend Blaine. You've got just three days to find that proof... or the money.

Narrator: Tucson, Arizona Territory. In the West, sulky racing was one of the most popular sports of the day. More important, it was a gentlemen's sport. And Bat Masterson was always a gentleman. This, too, was part of the legend. And it led him straight into trouble.

William Barclay 'Bat' Masterson: Hugh, here's your evidence.
Hugh Blain: I don't know how I'll ever be able to thank you, Bat.
William Barclay 'Bat' Masterson: The fact is, you can't. I know Purcell can't pay off, so ten percent of zero is zero.
Hugh Blain: You saved me fifty thousand dollars and ten percent of that is five thousand. There it is.
William Barclay 'Bat' Masterson: Mr. Blaine, I like the way you think - and pay off.