Smallville (2001–2011)
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The Kryoptonian metallic disc is returned to Clark following the death of Virgil Swann. Placing the disc in the cave reveals a message from the spirit of Jor-El instructing Clark to find ... See full summary »



(character created by: Superman), (character created by: Superman) | 4 more credits »

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Episode cast overview:
Lex Luthor
Jason Teague
Chloe Sullivan (credit only)
Lionel Luthor
Martha Kent
Jonathan Kent
Jor-El (voice)
Commander Cheng
Kai Xu ...
Chinese Officer
Mike Wu ...
Delivery Guy


The Kryoptonian metallic disc is returned to Clark following the death of Virgil Swann. Placing the disc in the cave reveals a message from the spirit of Jor-El instructing Clark to find the three Kryptonian knowledge crystals and unite them before others find them and use them to self-interest. The message goes on to tell Clark that allowing a human to assemble the crystals could lead to the destruction of Earth. The first stone, retrieved by Lex in Egypt in the season opener, is in Clark's possession in the cave. The second is apparently in possession of the late Swann's associates. And the third is located somewhere in China. Clark joins forces with Lana where they venture to China to search for the stone where Lex and Jason are also on the hunt for the stone. But they end up captured by the Chinese authorities and tortured for information to the stone's location, and it leads to the spirit of Isobel once again commandeering Lana's body to fight everyone to take the stone for ... Written by Shiro

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Release Date:

23 February 2005 (USA)  »

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Aspect Ratio:

1.78 : 1
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Did You Know?


The reporter who reports the story about Virgil Swann's death is named Tom Flores. Tom Flores is also the name of an associate producer for Smallville. See more »


When at the beginning of the episode Lana says "they're both three times zones away", it can't be right, because the actual difference between Central Standard Time (Kansas time) and China Standard Time is 14 hours. However if they were already approaching China, Lana's statement would be true. See more »


Lana Lang: We are definitely not in Kansas anymore.
See more »


Featured in Smallville: Blank (2005) See more »

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User Reviews

Looking for the Knowledge Stones
15 June 2006 | by See all my reviews

When Dr. Virgil Swann dies, Clark Kent receives the octagonal metallic disc through mail. He goes to the Kawatche caves and after inserting the disc in a stone, he hears Jor-El ordering him to find the knowledge stones to protect planet Earth against destruction. Meanwhile, Lex Luthor and Jason Teague are in Shanghai trying to locate one of the stones. Lionel Luthor gives a copy of the map and an airplane to Lana Lang, and together with Clark, they travel to China and meet Lex and Jason arrested and being tortured in a temple. When Lana is captured and also tortured, Isobel returns to protect Lana's body.

In "Sacred", more secrets are disclosed about the previous relationship of Lana and Jason's ancestors. This episode is only reasonable, without surprises and nothing special. My vote is seven.

Title (Brazil): "O Que É Sagrado" ("What is Sacred")

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