- Jack was originally going to be black
- Elaine was originally going to be black. She was also going to be named Sara.
- Mr. Ritter was originally the name of Niik's birth father. Who was also one of the head scientists enlisted by the government to work on the vampire virus.
- Roland was originally part of the British Special Air Service, which is where he gained all of his knowledge of sniping and knives.
- The entire series was going to start 20 years earlier
- Nick's helicopter has the Decepticon symbol painted on it which is an homage to the first Transformers movie made in 2007.