Thriller Characters: 4 male, 4 female Interior Set Actor manager and playwright William Gillette, best known for his portrayal of Sherlock Holmes in his hugely successful adaptation of Conan Doyle a popular play available from Samuel French, has invited his sister and the cast of his latest revival of the play for a weekend at his magnificent pseudo medieval castle on a bluff overlooking the Connecticut River. For entertainment Gillette has arranged a seance. Now the scene