Generation Hex

Generation Hex is the seventeenth episode of the eighth season and the 173rd overall episode of Charmed.

Summary
Two former students of Leo's from Magic School turn up at the manor to inform the Charmed Ones that a duo of demons Leo had imprisoned in the Magic School dungeons have escaped and are seeking revenge. Meanwhile, Coop takes Phoebe back to the past love's and pains of her life, hoping to break her barrier from love in the process.

Characters
Characters in bold appear for the first time in the series. Characters shown in flashbacks/holograms.

Book of Shadows

 * Viciously tempered, these low-level minions are often used as
 * shock-troops or assassins by more powerful demons. Use the
 * following potion vanquish: Mix the following herbs-
 * hemlock, wolf'sbane, Sumac petals and Imp powder.

The entry itself wasn't seen in this episode, but Piper brew the vanquishing potion.

To Send the Noxons to the Astral Plane
Because they are unvanquishable, they only way to get rid of the Noxon Demons is to banish them to the Astral Plane, since that plane exists out of time. Ryan and Jen, Leo's students, first hit the Noxon Demon with Piper's vanquishing potion, and then cast the spell to banish the Noxon Demon to the Astral Plane while he was regenerating from the potion.
 * Demon of Fire,
 * Demon of Pain.
 * We banish you
 * To the astral plane.

Powers

 * Telepathy: Used by Christy to send her sister telepathic messages and by Candor to send some to Christy.
 * Temporal Stasis: Used by Candor to freeze everyone except Christy.
 * Fading: Type of Teleportation used by Candor.
 * Orbing: Type of Teleportation used by Paige.
 * Telekinesis: Used by Candor to fling and grasp a Noxon Demon. Drake telekinetically closed the Magic School Doors (past).
 * Banishing: Used by Candor to banish the Noxon Demons.
 * Beaming: Type of Teleportation used by Coop.
 * Projection: Used by Coop to bring an energy field that was blocking Phoebe's heart to the surface.
 * Time Travel: Used by Coop to take Phoebe to some of her past loves.
 * Glamouring (past): Used by Past Phoebe to show Dex she's magical.
 * Shimmering: Type of Teleportation used by the Noxon Demons.
 * Fireballs: Used by the Noxon Demons to attack the Magic School students and to destroy a potion bottle.
 * Pyrokinesis: Used by Christy to set Candor on fire.
 * Holograms: Used by Coop to show Phoebe another part of her past loves.
 * Voice Manipulation: Used by Candor to sound like Piper.
 * Healing: Used by Paige to heal Piper.
 * Super Strength: Used by Christy to impale Candor with her arm.

Artifacts

 * The Noxon Demons used a Magical Weapon to torture Ryan and Jen.
 * Coop's Ring - Cupids use their Cupid Ring to guide their charges and are granted additional powers.

Glitches

 * While in the past, ("The Honeymoon's Over") Phoebe mentions the school is where she first met Cole. She actually met him at a crime scene the night before, this is likely because Prue was with Phoebe when Cole meet her, and they were unable to show footage of Prue due to behind the scenes issues.
 * The clip of Phoebe and Jason from "My Three Witches" was flipped. In the original scene, Phoebe was on the left and Jason was on the right. In the flashback Jason is on the left and Phoebe is on the right.
 * Phoebe mentions that her sisters had to kill Anton because he was a demon, when in fact he was a warlock.

International Titles

 * French: Les Noxons
 * Czech: Čáry mladé generace (Magic of Young Generation) 
 * Slovak: Nová generácia v akcii (New Generation in Action)
 * Serbian: Hex generacija
 * Spanish (Spain): La generación X
 * Spanish (Latin America): Generación hechicera