Aftermath is the pilot of Rex's Arsenal.
|Season 1, Episode 1|
We see Rex's house. Inside, there is no one at all. A single TV is on.
(Reporter) A giant sludge monster has been spotted downtown! The police and firefighters are trying to kill it. S.W.A.T. is being called.
The TV zooms in and we see two figures running towards the monster.
(Reporter) It appears that two teens are trying to approach the monster!
We see the figures live. One is carrying a sword and the other has a gun-shaped cannon.
The figures are revealed to be Rex and Nick.