Ed Zeddmore

Ed Zeddmore is a self proclaimed "professional" paranormal investigator and co-runner of the website Hell Hound's Lair. His friend, website co-runner, and partner investigator is Harry Spengler.

Season 1
Along with Harry Spengler, he is a "professional" paranormal investigator. He also co-runs the website HellHoundsLair.com. Afterwards, Ed and Harry got a call from a Hollywood producer and headed out to Hollywood to meet with him, not realizing that it was actually Sam who called them, pretending to be the producer. He and Harry later create Ghostfacers, which they try to get picked as a TV series.

Season 3
They meet up again with Sam and Dean by accident when they and their team of "Ghostfacers" enter Morton House on leap day with camera equipment to catch paranormal activity on film.

Season 4
Sam and Dean, trapped in an alternate reality created by Zachariah, are regular people and find that they have a ghost haunting and killing people in the office building that they both work in. The Ghostfacers return in an instructional video on their website which teaches people how to hunt ghosts, and it is used by Sam and Dean.

Season 5
An ad of the Ghostfacers program is seen at the middle of the episode Hammer of the Gods.

Season 1

 * "Hell House"

Season 3

 * "Ghostfacers"

Season 4

 * "It's A Terrible Life"

Season 5

 * "Hammer of the Gods"

Trivia
His name is most likely a reference to Winston Zeddmore, one of the four members of the Ghostbusters team from the films of the same name.