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.

It's Christmas time and K.C. tells everyone she has to go pick up a last minute gift, but instead goes to The Organization's therapist, Dr. Levinstein.

K.C. reluctantly agrees to try out for cheerleading with Marisa so they can spend more time together. Meanwhile, Craig tries to bond with Ernie over sports, but quickly learns his son's gaming skills are better online than on the field.

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.

K.C. Cooper, a high school math whiz and martial arts expert, learns her parents are spies when they recruit her to join them in the secret government agency. The newly appointed teen spy takes on her first undercover assignment, which coincides with her school dance. The mission: apprehend an enemy teen spy and recover the code for a virus designed to render every mobile device useless.

Ernie hosts a group of young international agents while KC is away on a mission.

K.C. tries to convince her parents that her brother, Ernie, who is a genius with computers but pretty clumsy at everything else, is ready to become a spy. However, Craig and Kira have a different plan and introduce them to their new little sister, Judy - a sophisticated humanoid robot disguised as a precocious 10-year-old.

When Scholastic Achievement Quarterly tries to interview K.C. for being the smartest student in her school, she disguises herself as her mom so she can be featured and hide her identity as a spy.

When Zane sabotages the Coopers' plane ride, it is up to K.C. to save herself and her family.

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.

To boost Ernie's self-confidence, K.C. and Craig tell him that he's in charge of their next mission, but secretly K.C. is really running point.

When Craig and Kira discover they were never legally wed, K.C. decides to throw them a do-over wedding.

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. sets a trap to reveal Brady's secret identity.

As K.C. continues to get closer with Amy, she plants bugs in the Bishops' house to get information on the weapon-distribution list.

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.

Ernie tries to impress The Organization with his science skills and develops a truth serum. Things get out of hand when K.C. accidentally drinks it and has to complete an interview to help Marisa get a job.

Kira's big moment at the Spy of the Year Awards is interrupted when the son of Tony "The Big Toe" Tolentino crashes the secret ceremony to avenge his father.

K.C. is tasked with tracking down a dangerous weather-controlling device on the same night as her homecoming dance.

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. and Ernie who, when trapped inside a bank vault, must figure out how to put their sibling rivalry aside and work together to escape.

When K.C. learns Erica and Abby are working with the head of The Other Side to carry out an evil mission at the Presidential election party, the Coopers must act fast to stop the enemy agents.

K.C. lies about losing the weather machine, and sets up her own mission to get it back.

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. 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.