Mystery, Incorporeal

Mystery, Incorporeal is the forty-second episode of Ben 10: Omniverse.

Plot
An old enemy emerges while Ben and Rook visit Kevin and Gwen at college.

Major Events

 * Charmcaster, Stone Creatures, and Zs'Skayr make their Omniverse debuts.
 * Ghostfreak makes his Omniverse debut.
 * Punchinello and Xagliv make their debuts.

Characters

 * Ben Tennyson
 * Rook Blonko
 * Gwen Tennyson
 * Kevin Levin
 * Zed
 * Charmcaster (first re-appearance; cameo)
 * Xagliv (first appearance)

Villains

 * Punchinello (first appearance)
 * Zs'Skayr (first re-appearance; cameo)
 * Darkstar
 * Stone Creatures (first re-appearance)

Aliens Used

 * Jury Rigg
 * Eye Guy
 * Ghostfreak (first re-appearance)

Allusions

 * The name of this episode is an allusion to the Scooby-Doo! Mystery Incorporated television series.
 * The scene in which Ben, Kevin, and Zed were chasing Darkstar through the different doorways was an allusion to the typical Scooby-Doo chase scenes.
 * The two girls in the purple hoods look like Raven and Jinx from Teen Titans.

Trivia

 * It is revealed Ben is still afraid to use Ghostfreak, because Zs'Skayr may take over.