Aden Gillett's character, Ian Kent, has a dog. This was Aden's own dog, an Italian Spinone called Echo.
The phone number displayed on the March Magna library wall begins with the code 01632. This is a fictional code only used by the film and TV industry in the UK, much like the 555 prefix used in the US.
Jack Roth is the son of the actor Tim Roth.
Emma and Susannah Fielding are not related.
Danny Webb plays Jeff Bowmaker in this episode. He previously played the role of Tony Kirby in episode 10.1, Dance with the Dead (2006).