Ron Perlman was sent a rough draft of the script and initially declined when asked to be in the movie after reading said rough draft. Perlman sent notes to writer/director Glenn McQuaid on how to improve the screenplay. After the script was revised to Perlman's satisfaction, he agreed to act in the movie.
Early in the film, the bartender in the pub says "there would be no Burke without the little Hare here." This refers to William Burke and William Hare, the famous body snatchers that operated in Edinburgh, Scotland in the early 1800s. Much of the plot for the movie is inspired by their story.
"A good cast is worth repeating!" appears just before the end credits, referencing the catch phrase of Universal Studios in the 1920s and early 30s. Though it appeared on every genre they made, Universal produced a dozen or so classic horror films during that time that are being referenced with this quote.