Lesley DeHaan was an assistant production coordinator on Supernatural from Seasons 1-5. She appeared, as did many of the crew in the spoof episode 2.18 Hollywood Babylon. She also makes an appearance in the Gag Reel on the Season 5 DVD.
Lesley was known to Supernatural fandom under the pseudonym "vancouvernights". Following the beginning of the Supernatural Postcard Campaigns in 2007, she made contact with the Spn Postcards and sent pictures of the postcards from the production office and commented to say how thrilled the cast and crew were with the postcards. She continued to provide photos of the postcards through to the end of Season 5.
In June 2010, she announced she was leaving Supernatural to work on a new series - The Killings - and revealed her "true identity".