Mr. Cat's doctor tells him that he is suffering from acute stress and must get some rest. The rest of the main four, who happen to be pretending to be superheroes for the day, decide to pitch in and help, but they just make everything worse.
"Let's Play Justice Masters" contains the following tropes:
- Downer Ending: Mr. Cat winds up even more stressed than he was before.
- Exact Words: The Justice Masters tell Mr. Cat that they will "rescue" him if he gets in trouble. Mr. Cat proceeds to fake being Driven to Suicide so that everyone thinks his life is in danger and therefore, he needs to be "rescued".
- Exhausted Eye Bags: Mr. Cat spends the entirety of the episode with these, as a result of him being extremely stressed and tired (and unable to rest thanks to Kaeloo, Stumpy and Quack Quack).
- Furry Reminder: When Mr. Cat decides to take a nap on the couch, he pats it with his paws, walks around on top of it on all fours and then curls up to sleep, like a real life cat.
- Manipulative Bastard: Mr. Cat tries to convince the Justice Masters to buy him an expensive spa package by telling them that he feels suicidal because he can't have it.
- Superhero Episode: Kaeloo, Stumpy and Quack Quack pretend to be superheroes and help Mr. Cat, only to make things worse.
- Unwanted Assistance: All of Kaeloo, Stumpy and Quack Quack's attempts to help Mr. Cat relax wind up stressing the poor cat even more.
