First Steps

First Steps is the fifth episode of Ben 10: Alien Justice Force.

Air Date
November 21, 2014

Plot
Ben takes Metrogirl (whose alter ego is Katie) to the prom, but Albedo crashes it with Julie by his side. Meanwhile, Mariella teaches Kai how to be a mermaid, after Wes died in the previous episode.

Characters

 * Ben Tennyson
 * Metrogirl
 * Mariella Daniels
 * Kai Green

Villains

 * Albedo
 * Galvanic Julie

Aliens Ben used

 * Ditto
 * XLR8
 * Humongousaur
 * Way Big

Aliens Albedo used

 * Sprocket
 * Evil Way Big