The Unfaithful, directed by Vincent Sherman and scripted by Dave Goodis and James Gunn, draws from W. Somerset Maugham’s 1929 play, The Letter. It features Ann Sheridan, Lew Ayres, Zachary Scott, Eve Arden, Jerome Cowan, Steven Geray, and John Hoyt, with a score by Max Steiner and cinematography by Ernest Haller. The film centers on a Los Angeles socialite who kills a man while alone one night, initially appearing…