Jonathan quotes Robert Oppenheimer, saying "I am become Death, the destroyer of worlds." In fact, when he said that, Oppenheimer was himself quoting the "Bhagavad Gita."
Roy Pilgrim seems to be a Dickens fan. Not only is his band named after the author's last unfinished novel, Edwin Drood, his home is called Bleak House - another Dickens novel.
The name of Roy Pilgrim's band, Edwin Drood, comes from the name of Charles Dickens' last and unfinished novel "The Mystery of Edwin Drood." This may be a reference to the real life band Uriah Heap, also named after a Dickens character (from "David Copperfield").
First episode in which the end credits assure viewers that no animals were harmed during the production.