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The demon tablet is the second tablet to be unearthed. According to Castiel, it was dictated sometime after [[Lucifer]] was imprisoned in [[the Cage]]. It contains sections on the demonic influence on the collective tapestry of the soul, and demonic transport to the regions of Hell. It also includes instructions on [[Hellhound Glasses|how to see hellhounds ]] and [[Demon Bomb|how to destroy demons]], as well as containing a number of spells, sigils, and protective circles that can be used against demons. The most notable spells on the demon tablet are instructions on how to close the Gates of Hell forever and how to create an [[Portal|interdimensional rift]]. It is currently in the [[Men of Letters Bunker]].

After being it is stolen from the bus station where it was kept, Sam and Dean track the tablet to a pawn shop where it was sold to [[Beau]]. The tablet is then sold at an auction run by the god of greed, [[Plutus]]. Sam, Dean, Kevin, and [[Linda Tran]] team up to recover it while Crowley and the angel [[Samandriel]] also try to get it. When the bid doesn't get high enough, Plutus tries to sell Kevin as well. Eventually Mrs. Tran bids her soul and the tablet is sold to her, Sam, and Dean. However, Crowley possesses Mrs. Tran and teams up with Beau to betray and kill Plutus. In the fight that follows, Crowley, who learns of Sam and Dean's plan to close the [[Gates of Hell]] forever, gets his hands on the tablet and escapes with it.

Linda Tran comes up with a plan to strike back against Crowley by hiring a [[witch]] named [[Delta Mendota]] to gather the ingredients they need for the "[[demon bomb]]" spell Kevin used to escape Crowley's henchmen. These ingredients are scattered all over the world. Delta brings them enough for at least one demon bomb but betrays them to Crowley, who kidnaps Kevin and leaves a demon to kill Linda. However, Linda captures the demon and takes him to Sam and Dean along with the ingredients and Kevin's notebook containing the information on how to create the bomb.

Donatello is seen attempting to translate the tablet to recover the spell to open an interdimensional rift into Apocalypse World, all the while hearing voices whispering in Enochian as he decodes the text. While he eventually shows his translation of the spell to the Winchesters, it is later discovered that Donatello gave them a fake spell. They realize that since the soul of a prophet acts as a filter for the darkness within the tablets to prevent them from being driven insane, but because Donatello's soul was consumed by Amara, the dark energies within the tablet had corrupted him. Donatello tells Sam and Dean that he translated the whole tablet and that he doesn't want to fight what the tablet was doing to him or give them any information on the spell. He casts a suffocation spell on Dean to show off his newfound abilities. Castiel strips the spell from Donatello's mind, leaving him brain-dead and only kept alive through life support. Castiel reveals that the spell requires four major ingredients -- the grace of an archangel, a fruit from the tree of life, the Seal of Solomon, and the blood of a 'most holy man.'

The angel tablet is the third tablet to be unearthed. It was created sometime before Lucifer was imprisoned in the Cage, and he concealed it in one of his crypts. The tablet contains multiple spells, sigils, and protective circles that can be used against angels. It appears to contains contain angelic [[trials]]to seal the gates of Heaven, though their purpose was they were not revealed. It also includes a second spell, personally placed by Metatron, that can banish all angels from Heaven and lock the gates. Metatron used the angel tablet to enhance his powers to make himself semi-equivalent to God. It was destroyed by Castiel to weaken Metatron and reclaim Heaven. Before his death, Kevin was able to translate the entire angel tablet into Proto-Elamite cuneiform. His translations remain in the Men of Letters Bunker.

Although Kevin finds it nearly impossible to translate the angel tablet into English, he is able to find a way to an ancient codex in the Bunker that helps him translate it the entire tablet into Proto-Elamite cuneiform which is hard to translate itself, an extinct abstract language. However, Kevin found finds a reference to [[fallen angels]] in the footnotes and Dean theorizes that the footnotes might contain Metatron's [[spell]] and how to reverse it. Ultimately, Sam and Kevin make a [[Deals and Pacts|deal]] with [[Crowley]]: in exchange for translating the Elamite, Crowley will get to [[Goblet of Blood|call]] [[Abaddon]]. After the call, Crowley keeps up his end of the deal, but learns from the writings that the spell is irreversible.

Kevin is seen attempting to read the entire angel tablet, but there was one section of the tablet that was almost indecipherable. He believed that when Metatron inscribed the angel tablet, he wanted to keep those specific words hidden, even from [[prophets]]. Using the tablet and an old Men of Letters book, Kevin and Dean discover a collection of sigils that can briefly hobble the possessing angel and return control to the vessel. Dean attempts to use these sigils on "[[Ezekiel]]" to tell Sam about the angel possessing him, but he catches on to their plan beforehand and alters the sigils in the storeroom to prevent the spell from incapacitating him. [[Gadreel]] takes the angel and demon tablets after killing Kevin Tran and telekinetically pinning Dean to a wall.

In the [[Men of Letters Bunker]], [[Metatron]] boasts about how he transcribed the angel tablet and knows all of the [[spells]] on it, suggesting that as a result, he can still help even in his powerless state. He later uses a sigil from the angel tablet against [[Amara]], but it is ineffective.

The [[Kevin Tran (Apocalypse World)|Kevin Tran]] from [[Apocalypse World]] enters the church where [[Michael (Apocalypse World)|Michael]] is holding Lucifer with the angel tablet in hand. He explains that he was able to collect the elements annotated in the angel tablet to perform a [[Spells#Rift_Opening_Spell|rift opening spell]] which uses archangel grace as the primary ingredient, prompting Michael to siphon a portion of [[Lucifer]]'s grace with his [[archangel angel blade]]. With Lucifer's grace, Kevin is able to perform the spell. In the ensuing shock wave, Lucifer is able to free himself and use the rift to escape and return to Earth, sealing the rift behind him as the spell is designed to admit one person at a time.

In a desperate attempt to save [[Jack Kline]], [[Sam]] calls in [[Lily Sunder]] and has her go over [[Kevin Tran|Kevin]]'s notes on the angel tablet in the hopes that she can read them and find something useful. However, Lily proves unable to read the angel tablet translations. Dean says that only a prophet can read Kevin's translations and they can't ask Donatello due to his brain-dead state.

* The tablets have played a role in season Seasons 7, 8, 9, 10, 11, 13, 14 and 1315, albeit with the roles in seasons Seasons 10 , 11, and 11 14 being minor cameos. The tablets were especially prominent in the storylines of seasons Seasons 8, 9, 13 and 1315.* The only season since their introduction that the tablets have played no role in at all is Season 12.