Boris Karloff had previously played the role of Galloway in a stage production.
After drugging Katie the housekeeper with tea to insure his alibi, Galloway pours out the contents of the cup in the sink, presumably to preclude any analysis of it, but he leaves the teapot to be discovered.
The only non-Caucasian prisoner in the 2500-man prison is Japanese Tetsu Komai.
The play opened on Broadway in New York City, New York, USA on 2 October 1929 and closed in March 1930 after 173 performances. The opening night cast included Arthur Byron as Brady, Russell Hardie as Graham, Anita Kerry as Mary Brady, Burr Caruth, Ethel Griffies and Walter Kingsford. Galloway was played by Henry Crossen.