The unassailable iconic Italian superstar Totò (nicknamed “The Prince of Laughter”) headlines this black comedy that’s like Kind Hearts and Coronets meets Danger: Diabolik. The Marquis di Torrealta is murdered by an assailant in all black, save for the name “Diabolicus” printed on his shirt. One by one, his siblings (and heirs)—a general nostalgic for the days of fascism, a youth-obsessed black widow, a twitchy surgeon, and a mild-mannered priest—come under scrutiny by the police, but just before any of their suspects can be arrested, Diabolicus strikes again. When the priest gives his inheritance money to the Marquis’s illegitimate son, the plot takes even twistier, more delightful turns.