Later, Sam and Dean recruit [[Donatello Redfield]] to translate the demon tablet to locate a spell capable of opening an [[Portal|inter-dimensional rift]] to make their way to [[Apocalypse World]] to save [[Mary]] and [[Jack]]. Due to his [[soullessness]], the dark energy resonating within the tablet causes him to go mad and retaliate against the Winchesters, forcing Castiel to strip the spell from his mind, effectively leaving the mad prophet brain-dead. After acquiring the necessary ingredients for the spell, Sam, Dean, Cas, and [[Gabriel]] make their way to Apocalypse World and lead an exodus of humans into their world to prepare for a battle against [[Michael (Apocalypse World)|Michael]] and his angelic armies.
The demon tablet is the second tablet to be unearthed. 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 how to see hellhounds and 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]].
===[[8.01 We Need to Talk About Kevin]]===
In a desperate attempt to translate the tablet, Crowley abducts all future [[prophets]], but none of them will possess the capability to read it until Kevin dies.
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.
Crowley, even though he has all of the future prophets, prefers that Kevin translate the tablet for him rather than him having to kill Kevin and get one of the others to do it. After Crowley cuts off one of Kevin's fingers, he agrees. Kevin reads the titles of the various sections to Crowley, including the sections on how to kill demons and how to seal the Gates of Hell. However, Kevin also finds a note from [[Metatron]], the writer of the tablet, stating that after he writes it, he plans to take his leave of God and his brethren and leave the tablets for humanity. This note reveals that there is a compendium of tablets, interesting Crowley with the fact that there are tablets on more things than demons and Leviathans.
===[[13.20 Unfinished Business]]===
As they wait for [[Gabriel]]'s [[grace]] to recharge enough to reopen the [[portal]], Sam tells Dean that [[Rowena]] is "boning up" on the demon tablet, possibly familiarizing herself with the spells inscribed on the tablet to prepare for their journey to Apocalypse World.
The angel tablet is the third tablet to be unearthed. It contains multiple spells, sigils, and protective circles that can be used against angels. It appears to
contains angelic [[trials]], though their purpose was 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.
[[File:Angel Tablet.PNG|350px|thumb|The [[Angel]] Tablet.]]
===[[11.21 All in the Family]]===
In the [[Men of Letters Bunker]], [[Metatron]] boasts about how he transcribed the angel tablet and knows all of the [[spells]] on it. He later uses a sigil from the angel tablet against [[Amara]], but it is ineffective.
===[[13.07 War of the Worlds]]===
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 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.
===[[13.13 Devil's Bargain]]===
* In [[7.20 The Girl with the Dungeons and Dragons Tattoo]], the contents of the suitcase Sam and Dean stole from the [[leviathans]] was a hunk of red clay, but in [[7.21 Reading Is Fundamental]] it appears as a gray stone before Dean breaks it open and recovers the leviathan tablet.
* In a deleted scene for [[13.07 War of the Worlds]] its shown that the reason [[Michael (Apocalypse World)|Michael]] never repeated the spell from the angel tablet is because Kevin didn't have enough ingredients to repeat the spell and they were almost impossible to find in the first place.
* The tablets have played a role in
season 7, 8, 9, 10, 11, and 13, albeit with the roles in seasons 10 and 11 being minor cameos. The tablets were especially prominent in the storylines of seasons 8, 9, and 13.