: Rhonda, Milligan, and Ms. Perumal board a dirigible in an attempt to catch up with and stop the children.

: At Curtain's compound, Mr. Benedict and Number Two observe the unsettlingly joyful behavior of his followers and realize he is using neurological techniques to induce artificial happiness.

: The kids successfully locate their next clue in a stateroom but are soon followed by a suspicious water polo team. Episode 3: A Gold Bar in Fort Knox

: On the ship, the children must blend in with the passengers to avoid detection by Third Officer Cannonball and Captain Noland.

: After arriving at the manor for a planned reunion, the kids find that Mr. Benedict and Number Two are missing.

: Defying orders from the remaining adults (Rhonda, Milligan, and Ms. Perumal), the kids stow away on the ocean liner Shortcut to begin their international rescue mission.

: Kate negotiates their freedom on the Shortcut by promising to fix the ship's engine, allowing them to arrive in Europe early.