The Siena Cathedral is large, but it was supposed to have become much, much bigger. Alberto Angela tells the fascinating story.

Karen continues to do her work for the Americans, spying on Olivetti and the Community Movement. Dalmasso and Mauro are seriously trying to undermine Olivetti's efforts to get elected and to bring him to his knees financially.

Eva goes to see Armando the mechanic, disguised as Franco's rich cousin. She intimidates him with her fancy language and manages to get the computer back. Franco has to find a job to pay his rent and tuition.

The laboratory team is all excited as they come up with some great new innovations. They need more funding, however, and decide to demonstrate the results directly to the board.

If the girls thought the mechanic was bad news, they now discover he is extremely bad news. Eva and Lola go to the concert to see Franco's friend perform, but are greeted by a different scene altogether.

Alberto Angela explores the Piccolomini Altarpiece with sculptures by Michelangelo, and the beautiful frescoed Piccolomini Library within the walls of the Siena Cathedral

The factory in Pozzuoli is a success, but the company has taken financial risks, which may be why Adriano is having nightmares. Dalmasso is closely following Adriano's movements.

Eva goes with Lola to see about getting her car fixed. The head mechanic comes across as shockingly crass, but the assistant is nice and easily fixes the problem with the car. Lola can't help flirting with him.

Alberto Angela focuses on one of the floor inlays depicting the story of Siena according to tradition. Siena shares a city symbol with Rome.

Adriano goes to Rome to try and get financing for his project. He is unpleasantly surprised to have to deal with someone he knows very well and with whom he had had a falling out.

There's some tension between Dante and Eva but they get distracted by Lorenzo who shows up at the restaurant in high spirits. The chief of police, also in high spirits, stops by to report on having caught a corrupt contractor.

This song, written by Ivano Fossati and sung by Loredana Bertè with her scratchy voice, has never lost its popularity with Italians.

The Siena Cathedral is one of the most notable examples of Italian Romanesque-Gothic cathedrals, and is well worth a visit, for both the beauty of the exterior and the unique marble artwork on the interior.

Karen's report to her superiors about Olivetti's plans prompts some serious spying on his operation by the U.S. Mario Tchou explains his ideas to the new team of young engineers.

Negri isn't happy to find out his money is gone, and blames it on his usual cleaners when they show up at the studio, late for work. Eva and her friends have a nice surprise for Filippo and his father, who is incredulous.