- The gem was born of evil's fire. The gem shall be his portal. He comes to claim, he comes to sire, the end of all things mortal.
- ―The prophecy of Trigon's coming to our dimension
"The Prophecy" is the forty-sixth episode of the Teen Titans series and the seventh episode of the Season Four.
Ever since their encounter with Slade, The Titans have been up day and night trying to figure out why he is after Raven and what does the symbol and his forehead mean. Raven still hasn't told her friends the truth and is trying to find a way to stop the prophecy on her own. When the team find Slade who leads them to an abandon library, they might finally discover the truth about the prophecy and Raven's destiny.
After their previous confrontation with Slade, the Titans begin to wonder why he has returned. Robin, Beast Boy, and Cyborg determine that the symbol on Slade's forehead is not from Earth. Robin vows to find out what the symbol means. Meanwhile, Raven is having a vision of the future, in which Slade taunts Raven by telling her time is running out. Raven states that she is not afraid, to which Slade replies he is not the one she should be afraid of. She denies the prophecy that she will destroy the world is true, and says she will not let it happen. Slade tells her that it is what she was born to do, and visions of a destroyed and ruined Titans Tower, as well as views of Cyborg, Robin, Starfire and Beast Boy being held by little ghost type demons, turned completely to stone. She awakens from the trance just as Robin comes to talk to her. At this moment, an alarm sounds.
The Titans quickly rush to the scene (a section of the city scheduled for demolition) only to get easily beaten by Slade, who uses his demonic fire powers to his advantage. Slade has another message delivered; he explains: The "S" is the Mark of Skath and there's something at the library that provides even more information about Raven's destiny. The Titans travel to the abandoned city library, only to find another Mark of Skath, which reveals a secret underground path that leads to another chamber. In there, statues begin to speak of the prophecy and the "gem".
Shocked by the recent happenings, Raven leaves her teammates for the moment and travels to Azarath to speak with her mother Arella. Arella sadly explains that it is too late, and suddenly the whole place is revealed as an illusion, and the reality is that Trigon has already disposed of the city and killed its inhabitants.
Back at the library, the Titans find several more Marks of Skath that lead to a chamber where Slade awaits. He claims that the "gem" is missing and it will open the portal to bring Trigon to the mortal world.
Raven finally returns, glowing with the mark of Skath, and beats Slade down, refusing to accept her destiny and telling Slade to tell her father to destroy her before she assists him. The Titans are shocked at Raven's glowing appearance, and after she defeats Slade does she finally tell them her dark destiny: she is the daughter of Trigon the Terrible, also known as Skath, and that she is the "gem" that will summon the demon lord to Earth. Raven also reveals that her destiny is dark, and that it is impossible to change the inevitable. To her surprise, her teammates vow never to let the End of the World occur.
Meanwhile, Slade informs Trigon that the prophecy has been foretold which he then says that Slade may one day "reclaim what he lost" if he continues to prove himself.
- Silkie makes a cameo in the episode. He jumps up and eats the red piece of food from the paper when it is thrown back.
- Cyborg cries when the Titans are falling in the library.
- Near the end of the episode, the Titans were looking out the window to be greeted by sunrise, and then cut to the outside of Titans Tower to reveal a new day. However, this was accompanied by a darker tone of music, unlike most sunrise shots in the series which normally represented a brighter tone. This was the only time in the series where a daytime shot of Titans Tower was used for a darker atmosphere.
- This episode, along with others referring to the season's main plot, has Raven begging either Slade or Trigon to leave her friends out of this, and every time, they coldly respond that she is the one who dragged them into this.
- Slade mentions that he's actually enjoying working for someone else, a reference to his role as a mercenary in the comics.
- They may not have know his name, as it wasn't stated there.
- Starfire reveals Trigon's cruelty is known to her home planet as well.
- This was possibly the darkest episode of the season, and even the series as a whole, besides Haunted, which was also one of the darkest of the series.
- In the episode "Go!", Raven claimed if they knew anything about who she really was, they wouldn't want her around. Robin clearly stated he knew enough, and still welcomed her as a friend. With her destiny now openly revealed, Robin (as well as the others) remained firm in his loyalty to Raven, signifying their tight friendship.
- To Beast Boy and Cyborg, they should not have been surprised that Raven's father was Trigon because in the episode "Nevermore", they had already found out.
- This is probably due to Trigon's name not mentioned, therefore not knowing the identity of the demon in their previous encounter.
- This episode has some similarities with the episode "Time Heals" from Ben 10: Alien Force.
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