K.C. and Ernie get trapped inside a bank vault and must put aside their sibling rivalry in order to work together to escape.

K.C. plans to give her dad the most perfect christmas gift of all, a surprise visit from his dad. When he arrives, she's the one who ends up surprised. It turns out that Craig and Poppa Earl not only don't get along very well, he also has no idea that they are all spies.