Only three episodes remain in 'Supernatural's eighth season, after this past week's Felicia Day-starring "Pac-Man Fever" took the boys on their last deviation of the year. And while next Wednesday's episode will introduce Sam and Dean to "The Great Escapist," the season' penultimate episode "Clip Show" will bring back some long-past characters! Get a sneak peek of 'Supernatural' season 8's final episodes inside!

Sam and Dean will have to face down the third trial if they hope to escape from 'Supernatural' season 8 alive, but first they'll need to find out what it is! May 8 episode "Clip Show" will see the brothers stumbling on a source of help within the Men of Letters archive, bringing back some majorly familiar faces along the way!

The CW released the full set of photos for "Clip Show" today (along with some other big announcements), as well as a press description of the episode:

FAMILIAR FACES RETURN AS THE THIRD TRIAL NEARS

Sam (Jared Padalecki) and Dean (Jensen Ackles) reunite with Castiel (Misha Collins).  Digging through the Men of Letters’ files, they stumble upon an undiscovered film which could be the key to the third trial. Metatron (guest star Curtis Armstrong) enlists Cass to mull over problems at home.  Meanwhile, Crowley (guest star Mark Sheppard) digs into Sam and Dean’s past. Taylor Cole, Graham Wardle, and Cindy Busby also guest star.

The photos give us an indication of how Abaddon returns from her fate in "As Time Goes By," while we're anxious to see if any additional surprise guests pop up along the way, but what say you?

Do you think 'Supernatural' is building toward its best finale yet? Check out the full set of photos from May 8's "Clip Show" below, and give us your predictions in the comments!

Supernatural Clip Show Preview Photos
The CW
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Supernatural Clip Show Preview Photos
The CW
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Supernatural Clip Show Preview Photos
The CW
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Supernatural Clip Show Preview Photos
The CW
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Supernatural Clip Show Preview Photos
The CW
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Supernatural Clip Show Preview Photos
The CW
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Supernatural Clip Show Preview Photos
The CW
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Supernatural Clip Show Preview Photos
The CW
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Supernatural Clip Show Preview Photos
The CW
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Supernatural Clip Show Preview Photos
The CW
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Supernatural Clip Show Preview Photos
The CW
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Supernatural Clip Show Preview Photos
The CW
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Supernatural Clip Show Preview Photos
The CW
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Supernatural Clip Show Preview Photos
The CW
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Supernatural Clip Show Preview Photos
The CW
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Supernatural Clip Show Preview Photos
The CW
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Supernatural Clip Show Preview Photos
The CW
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Supernatural Clip Show Preview Photos
The CW
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Supernatural Clip Show Preview Photos
The CW
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Supernatural Clip Show Preview Photos
The CW
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