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.

Sunspot warns Sydney, Mindy, Sean, and Jet that a solar eclipse will be happening soon. He shares the news of the phenomenon by illustrating it using a flashlight, an orange, and a smaller ball. Sydney and Sean explain to Mindy solar eclipses and why you shouldn't look at them, and they share tips for safely viewing an eclipse.

Matt and Inez try to find out the secret code to open the gate. Inez notes that there is a pattern in the shapes, and the two use the repeating pattern to discover the secret code.

Alex and Jamal deduce that the THABTO note is written in a secret code and work to decipher it.

To escape the island, the CyberSquad must reach before sunset one of the portals that Motherboard has placed on the island at random. The group uses the map to determine the distance to each portal and accounts for facts such as steep climbs and bridges being down. The kids and Digit decide to take the rapids to the bay, where they successfully reach the portal.