Recap / Kim Possible S1E4 "Tick-Tick-Tick"
Kim rushes into school desperately attempting to get her paper printed and make it to class on time. She doesn't make it, and gets caught and given detention by Mr. Barkin. After going home with the bad news, she gets a call from Wade that sends her on a mission to investigate the theft of a tiny "robot tick" from an entomologist (a scientist that studies bugs and insects) named Professor Acari. A security camera tape shows the thief; a bit later, Wade identifies her as Shego, a superpowered criminal who's wanted in at least eleven different countries.
After Kim's first detention session abruptly ends when Mr. Barkin mistakes Rufus for a mutant escapee from the science lab and evacuates the room, Team Possible pursues a lead that takes them to Dr. Drakken's Caribbean island lair. After getting captured, escaping from a Shark Pool Death Trap
, and making their way through a fight that seriously damages the lair, they return home.
Back in detention, one of the others tells Kim she has a "zit" on her nose; in reality, it's the explosive "nano-tick" Drakken created from the stolen robot. The situation comes to a head when Drakken and Shego track down the device, ready to take it back if they have to take Kim's nose along with it.
With some help from her detention pals, Kim defeats Shego and Ron uses Diablo Sauce to remove the tick allowing Kim to use it to destroy Drakken's hovercraft in the first (of what will turn out to be many) defeats at her hands. Kim then returns to detention with a newfound respect for its' inhabitants, who fight over the chance to have her paint their nails.
This episode provides examples of: