That wasn’t the ending I wanted or expected, but it wasn’t bad. How Evil is the 13th episode of Cells At Work?

That wasn’t the ending I wanted or expected, but it wasn’t bad. How Evil is the 13th episode of Cells At Work?
I’m both disappointed and curious about what’s happing so far. How Evil is the 12th episode of Cells at Work?
Heat Stroke, huh? That sounds boring. Why would I even watch this? How Evil is the 11th episode of Cells at Work?
Beware of the maids. They kill all the things. Macrophage finally got more screen time. How Evil is the 10th episode of Cells at Work?
Two rivals destined to battle; one of them a genius, the other not. No this isn’t Naruto, this is another flashback. How Evil is the ninth episode of Cells at Work?
A whole lot of Red in this episode. At least we finally got to see her do her job. How Evil is the 8th episode of Cells at Work?
A new challenger appears and his name is Cancer. How Evil is the 7th episode of Cells at Work?
A story from the past and a multi-episode plot, what is about to happen? How Evil is the 6th episode of Cells at Work?
What could be worse than food poisoning? Allergies. How Evil is the 5th episode of Cells at Work?
New episode new invaders of the body. How Evil is the fourth episode of Cells at Work?