Although cut from scenes, creator Graeme Manson shared through his blog that "Corncob" which is Ferdinand's (James Frain) Swiss bank account password in this episode, is also Ferdinand and Rachel's (Tatiana Maslany) BDSM safeword.
M.K.'s real name is Veera Suominen. Ferdinand meant to kill her along with a number of other clones in Helsinki, but she escaped.
When Sarah runs out of the trailer she steps on the doormat/pressure plate, no bomb goes off.
Sarah says to Dizzy that there are 22 clones that she knows of, 9 of which are still alive. These are Sarah Manning, Alison Hendrix, Cosima Niehaus, Helena, Rachel Duncan, Tony Sawicki, Charlotte Bowles, M.K. (Veera Suominem), and Krystal Goderitch.
Maria Doyle Kennedy (Siobhan Sadler) and James Frain (Ferdinand Chevalier) have previously worked together in the TV show The Tudors (2007). They played Queen Catherine of Aragon and Thomas Cromwell, respectively.