The Ghostfacers are back in Vancouver and already to film for their next Supernatural episode.

Unseen since season 4's It's A Terrible Life, is looks like Harry Spangler (Travis Wester) and Ed Zeddmore (A.J. Buckley) will be appearing in episode 15 (filming as 9-16).

Although their return was announced earlier in the season, fans were in the dark as to which episode the duo would be appearing in. However, Buckley and Wester both to Twitter to announced their return to set the day before filming began on episode 9-15.

"Exhausted with very little sleep packing getting ready to head to Vancouver to shoot #Supernatural tomorrow #ghostfacers #riseofthefacers," Buckley told his followers on Tuesday while Wester said he was flying out on Wednesday.

Executive producer Jeremy Carver teased the return of the incompetent ghostbusters in December, saying, "I think we can rest assured we'll be seeing the return of The Ghostfacers. They will be making a return in what actually is a really fun and pretty emotional episode."

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The episode is directed by Jeannot Szwarc and will be titled "Thinman."

Supernatural airs Tuesdays at 9 p.m. ET on the CW. Click the video below to see a preview this week's episode, "Sharp Teeth."

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Supernatural, The cw, Television