Waterfilter

Waterfilter is the second episode overall of the first season of Ben 10 (Reboot).

Plot
Ben accidentally awakens a Hydromander who wrecks rampage in Niagara Falls.

Major Events
Ben uses Overflow For the first time.

Characters

 * Ben Tennyson
 * Gwen Tennyson
 * Max Tennyson

Villains

 * Hydromander

Aliens used

 * Cannonbolt (2x)
 * Overflow (first appearance, 2x)
 * Heatblast

Trivia

 * Waterfilter was the first episode aired in the United Kingdom, sparking some confusion on what exactly the first episode was.