K.C. Undercover: The Final Chapter - S3-E24
Continuity mistake: When KC loses her phone you can see Ernie texts her saying that Amy is the mask, but he only gets the call from his parents saying that that Amy is the mask after that.
Suggested correction: This never happened. Ernie's text read "Bishops are in custody. Safe to break the news to Amy." Kira's text is the one that said Amy was The Mask.