Mario Casacci (12 August 1925, in Pontedera – 8 July 1995, in Rome) was an Italian screenwriter. He is best known as the co-creator of the character of Lieutenant Sheridan, who was played on the small screen by the actor Ubaldo Lay. Casacci's co-creator was his colleague Alberto Ciambricco In 1959, he also co-created, again with Ciambricco, the television program Giallo club.
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