Yancy Derringer Season 1 Episode 20 Hell and High Water

With the Mississippi River rising towards a record flood, the only thing will New Orleans is blowing a hole in a levee up-river. However, doing so would redirect the flood, inundating the new plantation of British Lady Charity, who is not so keen as to let the government inundate her land. She welcomes the help of an escaped convict with a stolen Gatlin gun and plans to exact revenge on Yancy.