Early on in the series, Dean's cell number is given, and for a while the studio had it set up so that anyone dialing the number would hear Jensen Ackles reading the message: "This is Dean Winchester. If this is an emergency, leave a message. If you are calling about 11-2-83, page me with your coordinates." The number is 1-866-907-3235.
The car Sam and Dean drive is a 1967 Chevrolet Impala. The show has five black Impalas that they use.
The car Sam and Dean drive is a 1967 Chevrolet Impala, which has been nicknamed the Metallicar by fans of the show. The show uses five black Impalas.
The only known sources of income for the Winchesters are credit card scams, poker games and playing pool.
Dean's car has the registration number: KAZ 2Y5.
Producers considered several methods of motivating Sam to take to the road with Dean. Turning Jessica evil was an option briefly, but in taking a page from Star Wars it was decided that her death would be the ultimate motivation for leaving home.
After the first season, the show was picked up by The CW because The WB merged with UPN to form The CW.
While filming season two, Jared Padalecki (Sam Winchester), broke his arm after performing one of the stunts on the show.
Many of the episodes are based on existing legends, myths, and ghost stories. ([Spoiler] For example the episode "Crossroads" is based in part on the legend of Robert Johnson - who in turn borrowed it from another Blues singer.)
All Episode titles come from famous horror movies. Including "Children Shouldn't Play with Dead Things" and "Wendigo" and many more.
The round blue/skull sticker on the top of Sam and Dean's laptop (seen on various episodes, more so in season one) is from a prominent local North Vancouver mountain bike company, Deep Cove Bike Shop.
Ogdenville, North Haverbrook, and Brockway are names of cities that Dean mentions in an episode in season one. These are made up cities where Lyle Lanley from The Simpson's universe made monorails in the episode "Marge v. the Monorail"
The character of "Bobby Singer" was named after executive producer Robert Singer.