This episode of "Alfred Hitchcock Presents" features an interesting Ray Bradbury story of murder and psychology, plus a fine performance by Claude Rains. The theater setting and the troubled main character make it a very good fit for the series, and the story is adapted efficiently into the show's format.
The story starts with a murder at a theater, with the investigation centering around Fabian, a ventriloquist played by Rains. Fabian displays an excessive attachment to his female dummy ('Riabouchinska'), and it quickly becomes obvious that he has something verging on a split personality, speaking truthfully only through the dummy. It's a weird and intriguing situation, and it is also interesting to see a young Charles Bronson as the detective who has to make sense of it all.
Bradbury's imaginative and thought-provoking stories do not necessarily lend themselves easily to screen adaptations, but this one overcomes the challenges pretty well. Rains has just the right approach and screen persona to make the challenging character work convincingly, and in particular it is worth watching him closely during the scenes when the dummy 'talks'. The somber story and the disturbed central character fit together well.