The Ultimate Enemy

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Danny Phantom
"The Ultimate Enemy"
Season 2, Episode 28-29
Production code: 39-40
Airdate: September 16, 2005
Written by: Steve Marmel
Directed by: Butch Hartman
Wincat Alcala
Kevin Petrilak
Guest(s): Eric Roberts as Dark Danny
Episode chronology
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"The Fenton Menace" "Secret Weapons"
"The Ultimate Enemy" is a special hour-length episode of Danny Phantom.


Danny is desperate to pass a standardized test called the C.A.T. After a fight with Box Lunch from the future, he goes through Lancer's suitcase and ends up with the answers to the C.A.T. He ends up, along with Sam and Tucker, taken into the future, after Clockwork tries to kill him. Danny find out that after cheating on the test ended up causing the death of his family and friends due to an explosion at the Nasty Burger, he let Vlad take the ghost half out of him. This unfortunately led Danny's ghost to take Vlad's ghost half out, causing the two ghosts to mix together, creating Dark Danny, destroying Vlad's castle, and killing Danny's human half. Dark Danny tries to makes Danny's horrible future to come true, but Danny defeats his evil half, but before he goes in the thermos he says, "Too weak to escape, then you're too late to save them!" Before his family and friends can be killed by the explosion, Clockwork saves them all. In the end, Danny chooses not to cheat on the C.A.T. and Jazz tells him she knows that he's half ghost.

Home video releases

  • Danny Phantom: Season 2
  • Danny Phantom: Season 2, Part 1
  • Danny Phantom: Season 2, Part 2
  • Danny Phantom: The Complete Series


  • This episode is tied with "Maternal Instinct" as Butch Hartman's favorite Danny Phantom episode.
  • This episode was ranked #10 in The 100 Greatest Nicktoon Episodes countdown, and was the highest-ranking Danny Phantom episode to make it into the countdown.

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