K.C. Cooper, a high school math whiz and karate black-belt, learns that her parents are spies when they recruit her to join them in the secret government agency, The Organization. While she now has the latest spy gadgets at her disposal, K.C. has a lot to learn about being a spy, including keeping her new gig a secret from her best friend Marisa. Together, K.C. and her parents, Craig and Kira, and her younger siblings, Ernie and Judy (a humanoid robot), try to balance everyday family life while on undercover missions, near and far, to save the world.
K.C. struggles to decide if she should continue as a full time spy or live a normal life at college.
K.C. struggles to decide if she should continue as a full time spy or live a normal life at college.
K.C. and Marisa take Amy on a trip to New York so she won't be at home to witness her "parents" being arrested by the Organization.
K.C. decides to save Ernie since it was her fault the barbecue failed. They learn the Bishops have planted listening devices and someone called the "The Mask" wants the weapons sold.
As K.C. continues to get closer with Amy, she plants bugs in the Bishops' house to get information on the weapon-distribution list.
The Coopers track down agents who are distributing weapons to enemy agencies, only to discover they are parents of K.C.'s classmate Amy.
The team strategizes on ways to find Bernice.
Byron waits for K.C. to respond and she says she's not K.C.. but her cousin, Cassandra. Byron suggests they all go to dinner, so K.C. breaks Bernice out of jail to play her cousin.
K.C. is assigned to protect a foreign diplomat at a university ceremony and must go undercover by joining the school's drumline to secure a key position next to the diplomat.
K.C. is tired of being just friends with Darien.
The Coopers prepare for Poppa Earl to visit with his new fiancé, Betty. He surprises everyone with how happy he is, but K.C. recognizes Betty from an unsolved case from 1977.
Ernie hosts a group of young international agents while KC is away on a mission.
K.C. realizes she misses Darien and goes to tell him, but he reveals he has a new girlfriend. K.C. lies and says she has a boyfriend and the two agree to go on a double date.
When Judy is due for an upgrade, the Coopers reminisce about their great times before they have to delete her memories and return her to the Organization.
Ernie and Marisa team up to help K.C. stop Brady and The Alternate from launching The Storm Maker.
When K.C. tells her family and The Organization that Brady is an enemy spy with The Alternate, the Coopers secretly work with Marisa to set a new plan in motion to catch him.
K.C. sets a trap to reveal Brady's secret identity.
K.C. lies about losing the weather machine, and sets up her own mission to get it back.
K.C. is tasked with tracking down a dangerous weather-controlling device on the same night as her homecoming dance.
Unbeknownst to K.C., Marisa is leaking classified information including her latest undercover assignment as a construction worker. Meanwhile, Judy’s disagreement with Diane over the tooth fairy jeopardizes the sophisticated robot’s disguise as an everyday 10-year-old.
K.C. struggles to make amends with Marisa after their fight, while Marisa wants a recommendation for The Organization from K.C.
K.C. is surprised by the results of her SAT score and believes someone tampered with her test. Meanwhile, Marisa expresses interest in becoming a spy.
When Zane sabotages the Coopers' plane ride, it is up to K.C. to save herself and her family.
K.C., Ernie and Marisa are on the run from Zane and eccentric enemy agent Sheena in the heart of the Brazilian jungle.
K.C. and her family of spies, along with her BFF Marisa, are on the run from archenemy Zane in Rio de Janeiro when they must take on another spy like non before – the fierce and slightly bizarre enemy agent Sheena.