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This episode marks the first appearance of Calhoun Fletcher (Peter Bonerz), the troublesome--and trouble-prone--distant cousin of mystery writer Jessica Fletcher (Angela Lansbury). At the behest of her Aunt Mildred (played in a delightful cameo by filmdom's former "Blondie" Penny Singleton), Jessica agrees to look up Calhoun in New Orleans, where the Mardi Gras celebration is in full swing. It turns out that Jessica's sleuthing talents are desperately needed: Cal has been accused of murdering a famous--and famously crooked--professional poker player.