Ann Sheridan & Zachary Scott in The Unfaithful (1947)

Obscurity factor: 7

Chris Hunter (Sheridan) kills an intruder in her home late one evening while her husband (Scott) is out of town. When questioned by the police, she claims not to know him, but it's later discovered by her lawyer (Lew Ayres) that he - a sculpter - had done a bust of her and they had been having an affair. She schemes to keep the truth from her husband and beat the murder rap. Will she be able to?

Wikipedia

On Friday I posted The Road Builder, a Patricia Neal film that had elements reminiscent of the Bette Davis vehicle, Now Voyager.  This film is a reworking of the Somerset Maugham, Bette Davis film, The Letter. It deviates from the original plot in a few key points, however and there are more misogynistic overtones to this version of the story, and that's saying quite a bit.

This film has been released on DVD through the Warner Bros. Archive Collection. The trailer is above, uploaded to YouTube by SkipJackTuner.

Obscurity factor: 7 (available on DVD, occasionally screened on TV, not high in the public consciousness)