When Agent Beverly from The Organization hassles K.C. for her last mission report, the same classified information that Marisa has inadvertently used as her class paper, the best friends must race against the clock to get the assignment back.

When Mrs. Goldfeder's house is robbed, K.C. recruits her dad to organize and lead a neighborhood watch group, much to his chagrin. Meanwhile, Judy enlists Pentatonix to help her deliver a special message to Petey.

K.C. goes undercover as a college student at The University of Maryland to befriend and protect the President of The Organization's daughter, Eliza. Meanwhile, Judy tries to talk Ernie into letting her join his Adventure Scout troupe.

K.C. goes even deeper undercover into The Other Side’s training ground and is close to getting the intel she needs, when she discovers Brett is her new training officer.

K.C. Cooper enlists the help of former spy and computer engineering expert Simone Deveraux when her family's sophisticated robot, Judy, runs away and is captured by enemy agents.

Ernie and Judy must travel to NYC for the Central Park Spooktacular to intercept an evil wolf serum, but their mission is interrupted when they run into “Jessie’s” Emma and Zuri at the party. Meanwhile, Marisa and K.C. throw their own Halloween bash back at the house and K.C. decides to dress up as a spy to impress the new boy in school, River.

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.

When K.C. goes undercover in a retirement home as wise-cracking senior citizen Bernie, her disguise unexpectedly wins the affection of feisty senior, Irma.