Sir John Oldcastle pentameter verse lines in both parts are irregular when using the name "Falstaff," but correct with "Oldcastle." Finally, there is the blatant disclaimer at the close of "Henry IV, Part 2" that disassociates the two figures: "for Oldcastle died [a] martyr, and this is not the man" (Epilogue, 29-32). There is even a hint that Falstaff was originally Oldcastle in "The Merry Wives of Windsor" too. When the First Folio and quarto texts of that play are compared, it appears that the joke in V,v,85-90 is that Oldcastle/Falstaff incriminates himself by calling out the first letter of his name, "O,
The Shakespeare Code makes reference to the many debates about Shakespeare's sexuality. Shakespeare flirts with Martha multiple times during the episode, and ultimately composes Sonnet 18 for her, calling her his "Dark Lady". This is a reference to the enigmatic female character in Shakespeare's Sonnets, although Sonnet 18 is in fact one of those addressed to a male character, the Fair Youth. Shakespeare subsequently flirts with the Doctor as well, at which the Doctor observes, "Fifty-seven academics just punched the air," a reference to the debates on this subject. There is a running joke throughout the episode in which the Doctor creates an