And Then There Were None

And There Were None is the fifty-first episode of Ben 10: Omniverse.

Plot
The episode starts in an alternate timeline/dimension with Ben walking on the street. Suddenly, he hears a woman screaming. The woman tells him that her cat stucked on the tree. Ben helps the cat and start to think about what is like to be a superhero. He then realizes that he is late from the game and looks at his watch that is broke. At the game Ben is the goalkeeper but unlike in the main timeline/dimension they won because of a player hit the goalpost in the last minute. Following the match, Ben gets robbed by Kevin Levin who takes his broken watch. He then meets his grandfather who takes him home.

Major Events

 * Bad Ben, Punk Ben, Emo Ben and Benzarro make their debuts.
 * Gwen 10 makes her canon debut.

Characters

 * Ben Tennyson
 * Ben Tennyson (alternate)
 * Max Tennyson (alternate)
 * Gwen Tennyson (alternate)
 * Kevin Levin (alternate; cameo)
 * J.T. (alternate; cameo)
 * Professor Paradox
 * Madison's Father (alternate; cameo)
 * Old Lady
 * Ben 10,000
 * Ben 23
 * Gwen 10

Villains

 * Vilgax
 * Eon
 * Albedo
 * Bad Ben (first appearance)
 * Benzarro (first appearance)
 * Emo Ben (first appearance)
 * Punk Ben (first appearance)

By Ben

 * Astrodactyl
 * Wildmutt
 * Spidermonkey

By Ben 23

 * Build-A-Guy (first appearance)

By Ben 10,000

 * Fourmungousaur (first appearance)
 * Atomic X (first appearance)

By Emo Ben

 * Snare-oh
 * Gutrot

By Punk Ben

 * Rath

​By Gwen 10

 * Wildvine

By Benzarro

 * Frankenstrike

By Albedo

 * Ultimate Humungousaur
 * Ultimate Spidermonkey

By Bad Ben

 * Ghostfreak
 * Gravattack

Allusions

 * And Then There Were None, along with And Then There Was Ben, are names parodying the title of the very first episode of Ben 10, And Then There Were 10.
 * "And Then There Were None" is the title of a mystery novel by Agatha Christie.
 * When Benzarro said, "Ben smash!" he was referencing The Hulk's catchphrase, "Hulk smash!".

Trivia

 * Even though this episode is part of the Galactic Monsters arc, it didn't have the Galactic Monsters theme song at the beginning.
 * The old lady referenced the meme "Can I haz cheeseburgar" while talking to her cat, ironically, both situations involves cats.