This episode sees the first appearance of Nicholas Young as Aldus Crick. Nicholas played the lead character of John in the original UK series of The Tomorrow People (1973). His character's name appears to be a reference to Aldous Huxley, author of classic sci-fi novel "Brave New World" (which shows a future society structured by abilities), and Francis Crick, the biologist and neuroscientist who co-discovered the DNA molecule.