- Chinese title: "小心叛变" ("Xiaoxin Panbian")
English title: "The Trial of Careful S."
Careful S. gains amnesia, forgets who he is, and is persuaded by Big M. into helping Planet Gray take over Planet Xing by disabling its shield system.
This episode contains the following tropes:
- Alien Invasion: The people of Planet Gray are able to break through Planet Xing's shield and invade, leading to a climatic battle that involves many Planet Gray spaceships flying through the air.
- Amnesia Episode: Careful S. is hit by a spaceship, causing a plug inside of him to come loose, in turn making him forget who he is.
- Amnesiac Villain Joins the Heroes: Inverted. After Careful S. goes amnesiac, Big M. is able to convince him to work for him and Planet Gray.
- Distracted by the Sexy: Careful S. distracts a couple of guards by throwing magazines their way. The magazines' covers depict beautiful women which distract the guards.
- Injury Bookend: Careful S. develops amnesia after he gets hit by a spaceship. A similar injury is what brings his memory back later on.
- Multi-Part Episode: It's one of several two-part episodes of the series.
- Previously on…: Part 2 is the first episode of the entire show to recap what happened in the previous part.
- Regained Memories Sequence: Mid-battle, Careful S. collides with a wall inside his Car Knight, realigning the plug that caused him to develop amnesia. This results in a number of frames with him and the other Supermen and Doctor H. to flash before him.
- Rube Goldberg Device: Big M. makes a rather complicated device to shoot meatballs at guard dogs to distract them. Big M. scares a squirrel, which runs in fear and bumps into a hammer that knocks over a bunch of balls. The balls are dispensed onto a wheel which dumps them onto a little cardboard platform which, when weighed down, push a button that causes a robotic arm to appear and, finally, flick a meatball at the dogs.
- The X of Y: "The Trial of Careful S."
