After they help Carmen the prehistoric cave-girl, Troy is able to convince Captain Wiremu not to follow the Council of the Future's orders, and to destroy older Troy's time virus.
The ship needs to be kicked started, so Balls offers to use his heart-drive to assist; meanwhile Kevin and Stuart try to persuade Galileo Galilei to invent the pendulum clock.
When a German knight decides to take Carmen as his eighth wife; Stuart and Wiremu need to get Johannes Gutenberg to invent the printer press, so to publish posters of the missing Carmen, in an attempt to find her.
Leonardo Da Vinci wants to paint a portrait of a rooster. Captain Wiremu and Troy convince him to paint Mona Lisa. Meanwhile, Carmen tries to reattach the ship to the wormhole.
The older Troy has sent a time virus to un-invent a major component of the Dult hardware; with Troy trying to hot wire the Dults and K9 together. The rest of the crew have traveled to 1928 to get the pacemaker reinvented.
As their ship reaches 2088, Troy and Carmen are captured by Frederik, leader of the Council of the Future. Captain Wiremu contacts older Troy to obtain his assistance to help the pair escape.
When Troy pretends to be Ernest Rutherford during an exam, he stops as he learns of Rutherford's later work. Older Troy tells the crew of the great time virus battle that is approaching.
