One of Alfred Hitchcock's first talkies, showing his early development of key themes of later films involving murder and characters not in their right minds. Innovations in sound (a stream-of-consciousness monologue and an orchestra playing on the radio) are interesting, as is the murderer (spoiler alert: a tranvestite mulatto trapeze artist!). An actress in a traveling theatre group is murdered and Diana Baring, another member of the group is found suffering from amnesia standing by the body. She's convicted of the crime but fellow actor Sir John Menier sets out to prove her innocence.
Hitchcock delivers two bravura sequences: one where he stays with an empty jury room while the verdict's being read just outside, and one where the murderer becomes haunted by the superimposed face of his victim, and hangs himself in front of a circus audience.