The Shakespeare Code it is one of his own from "Henry V", which was probably written in early 1599. When questioning Shakespeare about witches, Martha remarks that he has written about witches; a reference to "Macbeth", which Shakespeare denies. At the time in which the episode is set, Shakespeare had yet to write "Macbeth" or "Hamlet", which prominently feature the paranormal, such as witches and ghosts. There are numerous other allusions to Shakespeare's plays. Just before the Doctor steps out of the TARDIS, he exclaims "Brave new world", from Act V Scene I of "The Tempest". In an early scene a sign is
Lance Sweets so different after all. They are shown near the end of the episode kissing. Later on in the season it is revealed that Sweets is planning on proposing to Daisy again. Daisy's nickname for Lance is her "Sweet Lancelot", a reference to his name, Lance Sweets, and to the romantic character, Lancelot, of Arthurian myth. Sweets also sometimes refers to Daisy as "Miss Daisy", also using the phrase "What are you driving at, Miss Daisy?" in reference to the film, "Driving Miss Daisy". In the Season 8 episode "The Gunk in the Garage", Sweets turns down a fellow FBI agent,