User Score: 274
Goof: As Victor Dean writes his letter, a voice-over reads it out loud. Though he talks about 'serious consequences' you can clearly read the words the actor is writing: 'serois conseques'. Apparently he didn't think the camera would legibly pick up the text.
Several characters mention the year in this episode. Apparently the story takes place in 1922, which is strange as the novel was published in 1928 and Dorothy L. Sayers had the habit of letting her main characters age naturally with each novel. (Even more peculiarly, Clouds of Witness, the previous serial, was set in 1928, though the novel was published in 1926.) In the television time line these events take place before those of Clouds of Witness, in the novels it was the other way around.