 Whedon became involved with the show due to being a friend of series creator Greg Daniels as well as series co-star Jenna Fischer.Despite Whedon's experience with "Buffy the Vampire Slayer", the subplot about Dwight coming to believe that Jim Halpert is a vampire was entirely coincidental.The episode aired on NBC on February 15, 2007, and was seen by an estimated 8.84 million viewers according to Nielsen Media Research.