The pistols used by the Torchwood team are, in fact, airsoft pistols which run on gas. They are Tokyo Marui Hi-Cappa's with tactical torches fitted.
Owen mentions a Hoix going through seven doner sticks in 20 minutes. Doner kebabs, the most popular after-the-bars-close food in the UK, start with 20 to 30 pounds of seasoned meat packed on a vertical rotisserie stick. So, the Hoix ate 140 to 210 pounds of meat in 20 minutes.
Paul Marc Davis and Paul Kasey (who both are in this episode), along with Julian Bleach, have appeared in all three RTD Productions, Doctor Who (2005), Torchwood (2006), and The Sarah Jane Adventures (2007).
This episode takes place in the years 2009, 27, and 1901.
Owen Harper was born on February 14, 1980.