In the first series, it is established that Vampires must be invited in to houses. However in this episode, Mitchell (Aidan Turner) appears in the criminal's house with no invitation.
Charlene McKenna, here appears as Mitchell (Aidan Turner)'s old flame Josie, previously played by Clare Higgins in the final two episodes of series 1. The flashback tells the story of their meeting in 1969.
Jason Watkins' appearance as Herrick in the 1969 flashback is the longer of two cameos he has in this series, despite the character having died at the end of the previous one. It is strongly implied that this is the first time he donned a police uniform, in this case to help Mitchell (Aidan Turner) escape from the surrounded flat.
Music:
- Venus in Furs, by The Velvet Underground, from the album Velvet Underground and Nico (1967)
- I'm Into Something Good, by Herman's Hermits, from the album Herman's Hermits (1964)
- Funeral March for a Marionette, by Charles Gounod, from the suite Burlesque (1872)
- Somebody to Love, by Jefferson Airplane, from the album Surrealistic Pillow (1967)