The narrator describes how Andrew Carnegie, an entrepreneur during the Gilded Age, was able to manage a profitable steel company while living a leisurely live. This marked a new concept of the American Dream, where one could use technology and mass production for personal wealth and prosperity. Also. it is explained why Carnegie is unique from other entrepreneurs.
Dr. Holly Fearnbach discusses with Gracie Ermi how technology can be used to help Orcas. They explore how computer science can be used for purposes beyond what it is known for.
The Doctor realizes the reason why his future self gave River Song his sonic screwdriver. He uses it to save her and the people trapped in the library.
In order to save Poddleville, Jackie and Annie need to figure out the pattern for the podlock before Hacker and his henchmen. They take the back entrance to the vault and attempt to unlock it from there. After some thinking and discussion with Matt and Inez, Jackie figures out the pattern and enters the vault, saving Poddleville from Hacker.