In the episode "Assignment: Get That Assignment!" (often confused with others in S1), Marisa turns in a paper report to her teacher, Mr. Forman, that describes one of K.C.’s real spy missions.

Summarize the where the paper report is lost. Tell you more about Ernie's first mission in this episode. Provide a list of gadgets used in Season 1. Let me know how you'd like to continue ! "K.C. Undercover" Stakeout Takeout (TV Episode 2015) - IMDb

Ernie tries to prove he is a capable field agent, not just "the computer guy".

Stakeout Takeout: [s1e14]

In the episode "Assignment: Get That Assignment!" (often confused with others in S1), Marisa turns in a paper report to her teacher, Mr. Forman, that describes one of K.C.’s real spy missions.

Ernie tries to prove he is a capable field agent, not just "the computer guy". In the episode "Assignment: Get That Assignment