The dress Dorothy wears to the yacht party is the same dress she has made for her in Murder a la Mode.
The evidence label on the jar containing the spider is dated August 3, 1929.
Miss Fisher's house number is 221B, the same as Sherlock Holmes'.
Det. Insp. Jack Robinson temporarily designates Miss Fisher a "Special Constable of the Victoria Police Force", giving her a toy badge.
The tennis event Miss Fisher is sponsoring is called "The Fisher Invitational Tennis Tournament 1929".