After Marcia's first show, when the pipe smoke is mentioned again, Julienne says, "There are more things in heaven and earth... than are dreamt of" which is a quote from Hamlet.
Title is from Julius Caesar, Act 1 Scene 2, in which the soothsayer warns Caesar: "Beware the Ides of March."
Much of the action takes place at "Calpurnia Studios' on "West Rome Avenue," referencing both Calpurnia, Caesar's wife at the time of his assassination, and the location of the assassination in western Rome.
Mark Benton and Sian Reeves starred as husband and wife in Northern Lights.
The Fortby Sisters' names, Julienne and Marcia, are possibly inspired by the antagonists in Julius Caesar; namely, Julius Caesar and Mark Anthony.