The Sixth Doctor and Frobisher become involved in a power struggle in a mysterious castle, culminating in a bloodbath. The Doctor and Frobisher finds themselves involved with a society which strictly adheres to a complex and apparently illogical set of customs. Drawing inspiration from Shakespearean tragedy as well as exploring unpleasant elements of the father/child relationship and infanticide, this is one of the darker episodes.

This is the first Doctor Who audio story to feature Frobisher.

This episode addresses issues of crime and retribution, self-determinacy, religious extremism and custom.^{[citation needed]}

• The Doctor — Colin Baker
• Frobisher — Robert Jezek
• Captain Sejanus — Dan Hogarth
• Eugene Tacitus — Sam Kelly
• Berengaria — Roberta Taylor
• Livilla — Helen Punt
• Childeric — Peter Guinness
• Pepin — Stefan Atkinson
• Clovis — Peter Sowerbutts
• Arnulf — Bruce Mann
• Sculptor — Robert Shearman

• In the Whovian timeline, this story takes place between The Maltese Penguin and The Ratings War.
• The initial "miracle" of identifying a randomly chosen card uses the 3 of Clubs – a reference to Penn & Teller's favorite card to use in such tricks.
• This is the first time that Frobisher, a companion that appears in the comic strips of Doctor Who Magazine, is portrayed in an audio adventure.
• A short "music video" type cue can be found on a bonus track 4 minutes 32 seconds into the final track on Disk 2
• The background to the CD cover is made up of the 1996 TV Movie TARDIS set.

• Big Finish Productions – The Holy Terror