Big Deal At Little River Destry : Season 1 Episode 6

Destry agrees to help a pretty teacher raise funds to build a school for need Cherokee Indian children. The schoolmarm's plan is to utilize her foolproof mathematical formula to win at various forms of gambling, but Destry soon learns that the shady casino owners don't like losing, even if they have to resort to crooked means to derail the pretty blonde's string of luck.